MYSQL :: Select Count Where Entries Are

Count Unique Entries
I have a table that keeps track of visits. It has three fields: id, visitor_id and a timestamp.I want to be able to count the number of visits per month, which I can do with the following query.

[MYSQL] "SELECT date_format(timestamp, "%m") as `Month`, count(*) from visits group by `Month`;" [/MYSQL]

I would also like to be able to count the number of unique visitors for each month. That would be counting the number of unique visitor_ids for a month.

Count Database Entries
Anyone have an idea as to how i can count the entries in a table, starting from a specifc id number ?
Say I want to count all the entries made after id 29723. i cant just call the latest id number as some entries in between the starting id number (29723 for example) and the latest entry may have been deleted.

SELECT New Entries
SELECT new entries for last 2 days

My database table has a field which stores time() as a "time_stamp" (example: 1169523231). Each record is time stamped with the date it was entered. Now, I want to query and SELECT all entries that were made in the last 2 days. What I have so far is not working. I am not get any error message, but also no records. I tried going back to INTERVAL 30 DAY but still nothing. I think the problem is in my query.

SELECT * FROM mytable
WHERE time_stamp > DATE(DATE_SUB('CURRENT_DATE()', INTERVAL 2 DAY))

Count(*) In A Select Returns "1". It Should Behave Like Select Count(*)
i'm trying to make a query work properly but I got lost:

SELECT *,count(*)
FROM cancons c, musics m, discos d, r_discos_cancons rdc
WHERE c.c_id_music = m.m_id
AND rdc.rdc_id_disc = d.d_id
AND d.d_id_music = m.m_id
AND m.m_id = 24
GROUP BY c_id

note:
cancons (ca) = songs (en)
discos (ca) = cd's (en)
music (ca) = musician (en)

don't worry for the WHERE part. i need it because of the foreign keys.
this query returns a table with the title of the song and some more data. on the right side, I get another column called "count(c_id)" with the number "1" in it for each row. That's supposed to be due to the "group by" clause, I think.

I'd like to get the table with the songs, as usual, and, with the same query, I'd like to get the total number of rows selected.

Select Last 5 Records Entries?
I have an extremely basic MySQL table with 2 fields, "id" and "name". I want to be able to select the last 5 "name"s that have been entered into the database.

Select Unique Entries
A simplified version of my table is like this:

ID Time Thread
--------------
1__4:15__44
2__4:30__44
3__5:10__32
4__6:45__12
5__7:33__44
6__9:14__32

What if I want to select only one of each unique thread? And the ones that get selected must be the latest time? So here's my result:

ID Time Thread
--------------
4__6:45__12
5__7:33__44
6__9:14__32 .

Select All "first Entries
I have a table with projects, people and their positions within the projects.

(project;person;position)
a-m-s;jonny_eh;Developer (*)
a-m-s;yong_zhang;Developer
a-note;brummelisa;Project Manager (*)
a-renet;rchaplin;Project Manager (*)
a-renet;kstenger;Developer
a-s-m;matthiasanlauff;Project Manager (*)
a-s-m;pwkutter;Project Manager
a-s-m;durdanovic;Developer
a-s-m;isaacbob;Developer
a2j;ianibbo;Developer (*)

I want to select one row per project with the -first entry- (be it Project Manager or Developer) being set in the field "position" and all others are left out. In the example that would be the ones marked with (*).

Select Surrounding Entries
If I have a table with an auto_increment primary field, but I can't be certain that the surrounding entries have values of +1 and -1 the target entry, how do I select the target entry and the two surrounding entries in a single query?

Select Multiple Entries From One Column?
How can I select multiple snippets of data from a column in a database? I want to do something like this:

SELECT * FROM computers WHERE make=AMD, both, all2 AND system=solar, all, all2

In PHP of course! How can I do this? It's for a computer configurator script. I want to sort everything in the database by price and I had to run multiple queries and because of that, its not going in the order I wanted. Can I select that many entries of data in one query?

Select Statement Omits Entries
I am fairly new to using SQL and have coded a PHP webpage to download a few entries via the SELECT function. It is from two tables, so I've used aliases to assign their values and I'm at the point where everything works fine, except the table is omitting five entries which have no contact_name.

// create query
$select = "SELECT C.cust_contact_info_id, AC.contact_name, C.company_name, C.addr_line1, C.addr_line2, C.city, C.state, C.zip, C.phone
FROM cust_contact_info AS C, additional_contacts AS AC
WHERE AC.cust_contact_info_id = C.cust_contact_info_id
";

cust_contact_info_id is the field that is the shared variable of both tables. However, there may be no AC.contact_name for certain companies -- so it omits them. I believe there is an easy way to fix this SQL statement to include these omitted entries, perhaps with an OR clause but I'm not sure how it would work. I've tried this thusfar:

OR AC.contact_name <> 'null'

Contructing A Leaderboard, But Only Want To SELECT One Of Player's Entries.
I have a table where every person/player has entered a prize competition. Each entrant can have 3 selections (numbers), each populating a new row.

But for each player there could be 3, 6, 9 or more selections (or rows).

I want to construct a leaderboard but I want to only select every player's lowest selection along with their personal details. But I don't want to SELECT any of their other selections/rows.

If I only want each player's lowest selection then would I use something like GROUP BY playerID, but then this poses problems because it won't just select the lowest selection/value it would obviously just add them all up.

Is there a function or something similar that i can use to construct this SQL query? I've looked at FIRST and MIN. Not sure.

How To Check That Entries Are Linking To Dead Entries?
I've got two tables that have an one-to-one relationship (I divided it up into two for specific purposes). table2 has a field 'field' that refers to table1's 'field'. The 'field' on table1 is a primary key. table2's 'field' is unique to ensure a 1:1 relationship.

If an entry gets removed from table1, the entry in table2 that belongs to the removed entry should be found easily so I can remove it too. But... I'm not sure how to go about it.

The thing I thought of was:

SELECT table1.field FROM table1 JOIN table2 USING (field) WHERE table1.field NOT LIKE table2.field;

But that didn't give me anything at all. But I think what I wanted to achieve should be clear in this one. Does anyone have some ideas how to go about it?

SELECT COUNT(*) Or SELECT .. LIMIT 1?
If the purpose of a query is to see if atleast 1 record exists which would be faster?

SELECT COUNT(*) or SELECT .. LIMIT 1?

Both would use a WHERE clause.

One Table With Many Entries Or Many Tables With A Few Entries Each
I have a friend who is working on a web forum. He would like to design his database so that everytime a user starts a new thread, a new table for that specific thread is created. He will have another table that stores the names of the thread tables.

I suggested the idea of creating two tables. A table for threads, and a table for posts. All the posts go in the post table and have a threadID associated with it that references the thread table.

He thinks his idea of creating a table for each post is faster because instead of going through an entire table (extremely large table) to find the posts for a thread, his method will just take all the entries from the thread table for that thread. I disagree, I think his method is slower because using many tables will slow things down, and I'm assuming MySQL uses a hash system which will help find the entries almost instantaneously.

How To Select Count(*) And Something Else?
How do you select a count and another field without having to do two queries?

here's the query I'm using:-

SELECT
count(*) as totals, user

FROM user_posts
WHERE post='$md5'

SELECT COUNT
I'm counting rows from a mysql database able and trying to display the count. I have the following.

$count = "SELECT COUNT(*) AS newcount FROM stores";
$cr = mysql_query($count);
if (!$cr)
die(mysql_error());
if($cr){
//Make site ID now ...
$var1 = $newcount;
$var2 = P00;
$var3 = $var2.$var1;
}

The problem I have is thet $newcount seems to be empty. I have used count and not put "AS newcount" in the query but that made no difference. I have tried to echo the $newcount but again it is empty. Now, in PHP is there something else I must do to return the value of $newcount that I have missed?

SELECT Count
how to use SELECT Count.

Select *, Count
I want to perform a select query, but it doesnt return the data i have in mind. The result should be all info in 1 row with the highest date plus a total of game_id
This is what works best sofar.

SELECT * , COUNT( game_id )
FROM `battle`
WHERE game_id =4
GROUP BY game_id
ORDER BY b_date DESC
LIMIT 1

Yet this doesnt return the last date but the first. Everything else i tried the count function returned 1 even though it should be 20 for example.
How can i solve this?

SELECT COUNT(*)
I heard SELECT COUNT(*) can take a lot of resources if your counting a table with lots and lots of rows (hundred thousands, millions).
What if you add A WHERE clause to it? So something like:
SELECT COUNT(*) FROM table WHERE pid = ?
(pid is a index too btw)
IF adding a where clause, does it still scan the entire million plus rows, or only scans what is returned from the WHERE clause?

SELECT COUNT Or SUM()
Is there a difference between these two functions when your trying to gather how much a item appears in a database?
For example, which one will be better for a database w/ ~150,000 rows.

SELECT COUNT(category_id) FROM Threads WHERE category_id = '2'

Will return ~50,000 rows matching category 2

OR

SELECT SUM(category_id = '2') AS total FROM Threads
total will be ~50,000 rows also.

Select Count
I need to do the follow SQL..PHP Code:

SELECT COUNT(t.id), COUNT(p.id) FROM threads t, posts p

and add the two counts together... within the SQL query can i do this?
or do i just have to return the arrays and added the results seperatly.

Select Count(*) Timing Out
I'm doing a "select count(*) from table1" and it takes forever, more then 3 minutes, for the result to come back. I'm running MySQL 5.0.19 on RedHat, I know my table has 51M records. When I run a "show table status where name='table1';" it returns the results in a few ms and gives me a record count. My table is defined below, I've tried forcing use of each index individually and forcing no indexes and all combinations and always the same result. Server is an intel based 64bit cpu with 16GB ram with pretty much nothing else going on......

Select Count(*) Issue
I have what I think is a simple SQL command getting unexpected results.

PHP code:

$query = "select count(*) as total_rows from part_master where mfg_id = '933' and part_no = '3601' order by part_no";

$result = mysql_query($query);

The result is total_rows = 0.

I run the same SQL from the DOS command window and get:

mysql> select count(*) as total_rows from part_master where mfg_id >= '933' and
part_no = '3601' order by part_no;
+------------+
| total_rows |
+------------+
| 1 |
+------------+
1 row in set (0.01 sec)

I'm running the latest versions of Apache, MySQL and PHP on a WinXP box.

Select , Count(*) In MySQL
I write the following code in vb6 its work fine for Access and MSSQL but not work with MySQL, RecordCount return -1 always kindly help me..

Dim mms As ADODB.Connection

Set mms = New ADODB.Connection
mms.ConnectionString = "DRIVER = MYSQL ODBC 3.51 Driver;SERVER=10.48.60.183;DATABASE=mms;UID=kma;pwd=abcd
mms.Open

Set rstIWOrder = New ADODB.Recordset

SelectString = "select * from IWOrder where WON ='"
SelectString = SelectString + txtIWO.Text + "'"
rstIWOrder.Open SelectString, mms, adOpenStatic, adLockReadOnly

If rstIWOrder.RecordCount = 0 Then
MsgBox "Internal Work Order not Found in Database"

else

or

SelectString = "select count(*) from IWOrder where WON ='"
SelectString = SelectString + txtIWO.Text + "'"
rstIWOrder.Open SelectString, mms, adOpenStatic, adLockReadOnly

SELECT COUNT (*) FROM Table
Newbie: SELECT COUNT (*) FROM table

When I run the above query from the command line, it works
fine.

When I run it from my powerbasic program, I can't seem
to get a reasonsible result.

What type of result does count return?
I get something that looks like this:
[ CHR$(133) ][ CHR$(21) ][ CH...

and the type is given as -5...

What is this type?

Php, Mysql And Select Count
I use as the base an existing system, called PHPNuke. My programming work before are only on Assembler, C, C++, Perl and other Databases than MySQL. In PHPNuke and/or the MySQL Queries contained in it there are sequences for simple counting rows (without further processing). The following sequence is permanently used (as example):

$result = $db->sql_query("select * from "$prefix."_sometable where someting='$foo'");
$numrows = $db->sql_numrows($result);

I would make it rather in such a way:

$result = $db->sql_query("select count(*) as count1 from "$prefix."_sometable where someting='$foo'");
$numrows = intval($db->sql_fetchrow($result['count1']));

Now my hopefully not too stupid question. Is there a reason, why e.g. in MySQL large genuine result quantities must be formed, only in order number of lines to determine? I worked so far actually only with other databases. But it is quite possible that that makes any sense here - who knows? Knows here someone the mystery solution?

SQL - Select Where Count Equals Zero
I have a table of products and a table of ratings so people can rate the products. I would like to select all the products the user has not rated. My thoughts are to join and count returning rows where count equals zero. But I am just not sure how to do it.

I have this that does the exact opposite of what I need, this returns just the row that I rated, I need all but the rows I rated, Make sense?

SELECT products.*, COUNT(ratings.id) AS count FROM products
LEFT JOIN ratings ON ratings.rateable_id=products.id
WHERE ratings.user_id = 10
GROUP BY products.id

(10 is the hard coded user id)

How can return ALL except the rows I rated?

Select Count(*) > @foobar
i have a query as follows and is unsure whether it is mysql or php:

$result = mysqli_query("SELECT COUNT(*) > @foobar AS status ....") where
it's suppose to get a one row value of either '0' or '1' (false or true)

if i were to do a SELECT COUNT(*) FROM...
i can use the php $row["COUNT(*)"] to refer to the index.

if i were to do a SELECT COUNT(*) AS status FROM...
i can use the php $row["status"] to refer to the index.

but in this case SELECT count > @foobar AS status,
refering to $row["status"] gives a empty value. however, running the
same query in mysql command prompt produces

+------+
|status|
+------+
| 1 |
+------+

php doesn't support such select statement? even array_keys($row) returns
empty.

Select COUNT(Name) Into PCount
i wanna count the total number of records by using this sql query...
Select COUNT(Name) into pcount from agent where agentcode = 'abc123';

this return me the total number of all records...

but when use this query:

Select COUNT(Name) into pcount from agent where Name = 'goh';

it return me the correct result....

may i know what is the problem and how can i solve it ??

Select Count Problem
I have two queries that I want to combine.

select Count(flag) as Good
from table
where
flag = 'G'
Group by Fruit

select Count(flag) as Bad
from table
where
flag = 'B'
Group by Fruit

COUNT (*) Inside Select
I am doing something wrong i would like to do a count inside this select for example:

SELECT th.tid, th.tname, th.tmain
(SELECT COUNT(*) as postnumber FROM forumpost AS post WHERE post.ptid=th.tid)
FROM thread as th WHERE tmain=1

Select Statement With Count
I want to know how many different etries there are in one column. My table: pics{id, pic_name,category} There are many pics inside, but only a few different categories, e.g. (outside, inside, garden). Now I need a Select count on this column, and for the example above the result shoud be "3" - 3 different categories

"SELECT DISTINCT COUNT(category) FROM pics"
delivers a much higher number, it counts all rows of the table.

Slow Select Count(*)
I have a table with 75,000 rows.

An Explain tablename shows this

'TourPartsID', 'int(10) unsigned', 'NO', 'PRI', '', 'auto_increment'
'TourPartID', 'int(10) unsigned', 'NO', 'MUL', '', ''
'TourPartTypeID', 'int(10) unsigned', 'NO', 'MUL', '0', ''
'Language', 'int(10) unsigned', 'NO', '', '0', ''
'XML', 'mediumblob', 'NO', '', '', ''

When I do a Select count(*) from table, it takes about 12secs to return my number. This is occuring in the QueryBrowser and from the .NET library when it calls the Stored Procedure that does the Select count(*)....

My only quess that is my last column is a MEDBLOB but since I am NOT indexing that, I would figure MySQL ignores it.

Select Count Syntax
im just a begginer in mysql. I have a problem on how can i place a result of a select statement query in a variable.
Here my select statement:
Select count(employee) from employee where empmonth =
1 and empyear = 2005;
This syntax is ok, it return a result of 123894 records. But what I want is to place the result in one variable that i can access inside the program so that i will run this select statement only once. I have tried this one syntax:
Select count(employee) into ll_count from employee
where empmonth = 1 and empyear = 2005;
but it return a result of zero record.

Two Table COUNT/select
I need to count the total (using SUM) from one column in one table, where the a condition is set from another table.
so far I've been striking out with this:
Code:

SELECT maxbid SUM(maxbid) FROM `probid_auctions` WHERE probid_categories.parent = 1853

Select From Table And Count Results In Another
I have to tables table one containing airports and table two containg bookings. What I need to be able to do is count how many rows are returned form the booking table that matches each airport in the airport table.

So I might have in my airport table
Newcastle
Heathrow
Standstead
etc etc

and in my bookings table I have

Newcastle
Newcastle
Standstead
Heathrow
Heathrow

And what I want returned is
Newcastle(2)
Standstead(1)
Heathrow(3)

How can I go about doing this.

Select Query With Character Count
can you help me with creating a select query where the character count in a specific column is more than, say, 20 characters?

Doing A Select Statement With An Array To Get A Count
I posted this in the php forum and it was suggested I try it in the MySQL area instead. Sorry if this gets posted more than once.

So here is my problem. I have a series of mysql queries to allow users to set filters for the data that is returned. They are searching for clients (Site_ID) with projects (Request_ID). A single client can have multiple projects. I want to be able to count the number of projects that are returned from a query. Here is the tail end of that code...

Multiple COUNT() In SELECT Statement
SELECT
COUNT(s01_Products.id)
FROM
s01_Products
LEFT JOIN
s01_Attributes
ON
s01_Attributes.product_id = s01_Products.id
LEFT JOIN
s01_Options
ON
s01_Options.attr_id = s01_Attributes.id
WHERE
(
s01_Products.active = 1
) AND (
(
LEFT(s01_Options.prompt,5) = "Small"
) OR (
LEFT(s01_Options.prompt,2) IN (28,30)
)
)

SELECT
COUNT(s01_Products.id)
FROM
s01_Products
LEFT JOIN
s01_Attributes
ON
s01_Attributes.product_id = s01_Products.id
LEFT JOIN
s01_Options
ON
s01_Options.attr_id = s01_Attributes.id
WHERE
(
s01_Products.active = 1
) AND (
(
LEFT(s01_Options.prompt,6) = "Medium"
) OR (
LEFT(s01_Options.prompt,2) IN (32)
)
)
And one for Large and Extra Large...

I would obviously like to combine all 4 queries in to 1 so that I can get my 4 counts in a single,

SELECT COUNT Syntax Error
Have a syntax error with the following query ...
SELECT number COUNT(*) AS vessels FROM process_fleet WHERE uid=1
No idea what is wrong with the sytax... can only one see what I'm missing?

Question About Select Count(*) With Group By
suppose a hypothetical table called 'table' with one field called 'field' of
an arbitrary type.

select count(*) from table where field='value' group by field

produces no rows when run under the latest mysql. without "group by" it
produces 1 row.

is this according to the SQL standard or is this just a coincidence? in
other words, can i rely on this behaviour to deduce that there are no fields
with value 'value' in 'table'?

Select Count From A List Of Digits ??
I'm using php to extract data from postgres and print to browser. I have data that was input through checkboxes on a form - each checkbox had a different value but got pushed into the same column. Code:

SELECT Sentece Choosing The Row With The MAX COUNT
i need to make a sentences that selects the row with the biggest count. goes something like this i make the COUNT of a column then i want to show only the biggest result.

Trying To Select Values From Column And Count Each Different One
say my column values are thus:

1 | 1
1 | 2
1 | 3
1 | 4
2 | 1
2 | 2
2 | 3
3 | 1
3 | 2

my select is like this:

my $sth = $dbh->prepare("SELECT session_id, col2
From $table
");
$sth->execute;

while ( my @fields = $sth->fetchrow_array) {
print qq( $fields[0] );
}

I want to be able to show that there are three individual values (in col1) and that there are 9 values in col 2. I also need to show that (based on the number of values in col2 [relative to col 1]), that the average number is 3

Should I use select using UNIQUE (or some other value), or, should I select as shown but put it in a perl hash - or soemthing else?

Non-Numeric Result From SELECT COUNT(*)
I'm using MySQL 4.1.11 and MyODBC 3.51.11.
I've a problem with SELECT COUNT(*) query.

I'm using mysql in ASP. I'm executing this query for example:

Select Count(*) as TotalMembers From Members; //with recordset("Totalmembers")
-- or --
Select Count(*) From Members; // with recordset(0)

but both of these queries aren't giving Numeric (Integer) results...
I'm cotrolling them with IsNumeric function by ASP. But it gives False result.

Also i cannot using mathematical operators such like +-*/ . Because result isn't numeric. And an error occurs.

If you know asp, could you try to use math operators with select count(*) result?

Select Count(*) Problem In Mysql Ver. 4.1
Difference mysql 4.0 and 4.1
My code:

strSelKoresOczek = "SELECT COUNT(*) il_Oczek";
+ " FROM dekretacje d";
+ " left join dekret_realiz dr on d.dekr_id=dr.dekr_id";
+ " left join rejestr_glowny rg on d.prej_id=rg.prej_id";
+ " left join jorg_slownik on
d.jorg_id=jorg_slownik.jorg_id";
+ " WHERE d.symb_rej='RKP' and d.p_rodz='Z'";
+ " and d.dekr_uzytk_id="+ALLTRIM(STR(giUzytkID));
+ " and d.data_czas_dekrwyc is null";
+ " and dr.dekr_id is null"

ok_wyk = SQLEXEC(gnConnHandle,strSelKoresOczek,"cur_sel_koresoczek")

In mysql control center select count(*) return value bigint(21)
Visual fox pro 8 In version 4.0.18 cur_sel_koresoczek.il_oczek is type
Numeric Visual fox pro 8 In version 4.1.16 cur_sel_koresoczek.il_oczek is type Char.

Select Count(*) Showing -1 Rows.
In one of my preliminary tests with mysql, the below statement is showing the following way. What does -1 rows signify in the table with the select count(*) query. Is this (-1 rows in the query result) an error condition to be taken care ?.

bash-2.03# ./mysql -u test
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 8 to server version: 5.0.18-max

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

mysql> use test
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A Code:

Select Count From Multiple Tables
I want to select persons from a person table, and count from an "events", "trainings", and "leads" table, but I'm not able to figure out how to select distinct so that I get one person each and a count for how many times that person appears in each other table. My statement looks like this right now:

SELECT person.name, count(leads.lead_id), count(events.event_id), count(trainings.training_id) FROM person LEFT JOIN leads ON leads.person_id=person.person_id LEFT JOIN eligible ON eligible.person_id=person.person_id LEFT JOIN events ON events.event_id=eligible.event_id LEFT JOIN trainings ON trainings.event_id=events.event_id GROUP BY leads.lead_id, events.event_id, trainings.training_id

Is it even possible to do what I want?

SELECT Count(xxx) AS Xxx Does Not Return Integer
i'm using the latest downloaded version of MySQL and am currently producing an app that is compatible with MySQL, MS Access and SQL 2000/2005, i've not really come across any problems making the app run across the 3 platforms (except for Access's wierd date syntax and MySQL's lack of a boolean field) but the followin is doing my head in:

If i run a count query such as

SELECT Count(CategoryID) AS CountCats FROM MyDownloads etc etc
CountCat = (Downloads.Fields.Item("CountCats").Value)

And then run an IF statement in my page code such as:

<% If CountCat = 0 Then .... %>

This works fine in Access and SQL as the Count value is seen as an integer, but in MySQL this chucks an error unless the code reads

<% If CountCat = "0" Then .... %>

Why is the count value not returned as an integer????? I cant understand that at all, what else could it be? I've seen another post on the forum along the same lines but with no answer to it.

This is grim as every page that uses a count needs to have an additional IF statement put on it to change the second IF statement if the database is detected as MySQL.

Select Count Where Entries Are < 4