MYSQL :: SQL To Check For A File?

How To Check For Date/time Ranges Within Record (check For Schedule Conflicts)
You want to check scheduling conflicts and you have a record like:

appointments(table):
apptID
beginningDate
endingDate
beginningTime
endingTime

It's easy enough to check if a time is within that record. Say you want to
check if 8:00am to 10:00am is available, you would use this:

SELECT apptID
FROM appointments
WHERE (beginningDate = '2006-01-19' OR endingDate = '2006-01-19')
AND ('08:00:00' BETWEEN beginningTime AND endingTime
OR '10:00:00' BETWEEN beginningTime AND endingTime)

BUT, what if you have an all-day appointment (8:00am to 5:00pm) and there
exists an appointment already scheduled from 10:00am to 11:00am. The above
query would not find it.

Another question is what if the appointment is more than two days. Say, it's
from Monday - Wednesday from 8am to 5pm. The above query would not
successfully catch it if you wanted to schedule an appointment on Tuesday.

(I might be able to generate a date range using PHP, don't know if that's
the best way)

Check Query Please
This is giving me an mysql error. Why?

DELETE FROM subscribers,list_subscribers WHERE subscribers.id = list_subscribers.ls_sub_id AND list_subscribers.ls_list_id = 1

Check 366 Day Expiration
Needing to filter on a datetime col Mplan.Start having runtimes of 366 days:

roughly:
SELECT *
FROM Plan
WHERE (CURRENT_DATE () <= Plan.Start + 366 days)

should dates be formatted 1st?

...WHERE DATE_FORMAT(Plan.Start ,'%Y%m%d') >= DATE_FORMAT(CURRENT_DATE(),'%Y%m%d' + ?)

problem with the following is that all future dates are included, as mysql manual states (which can't be included in this application):

...WHERE CURDATE() <=DATE_ADD(Start,INTERVAL 366 DAY)

2 + 7 = 11. Let's Check It... Iterating
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Numeric Check
I am looking for some function that tests if a value is numeric. I could not
find a function for this.

At the moment I am using "WHERE CONV(myfield,10,10)!=0" but I suppose there
must be a better way.

Check Constraint
does mySQL provide Check Constraint?

I try this :
alter table city add check(id>0);

It runs without error but when i tried to insert a city name with id = 0 the query runs ok. the check constraint fail to work.

oh ya, what is the syntax to see all the check constraint on a table?

CHECK Command
Could I use the check command to see if a certain identifier will never exceed a default value when data is put into the table.

capacity INTEGER NOT NULL DEFAULT 10,
CHECK(capacity<=10)

Check For Existing Row ?
How do I determine if a row already exists ?

// see if a row has id=100

$id=100;
$query="SELECT * FROM mytable WHERE id=$id";
$result=mysql_query($query);

...what do I check now ?

User Check
I have been playing about with a website of mine. I was wondering when using mysql, how do i check if a username & email address is already being used.

CHECK Syntax
I have a table as follows:

CREATE TABLE country
(
codeCHAR(2)NOT NULL,
...
...

CHECK (CHAR_LENGTH(code) == 2)
);

The entry for 'code' MUST be two characters long. Although CHECK is not
yet implemented by mySQL, is the above syntax correct?

Secondly, the entry for 'code' MUST not contain any numbers. What is
the syntax to check for that?

Currently I am doing the checking before inserting the data but would
like to implement it in the database too.

Duplicate Check
I have a table with two columns, T1(id,info). I'd like to add some data from another table which also has two tables T2(id,info).

I have to add data from T2 into T1, but i have to check if the data already exists. Until now i did like this : select info from T1 where info in (select info from T2) but it fails if i have more that 5.000 records. Is there another way to do this ?

Performing A Check
I have a table called customer with a field called dateAtAddress. I want to perfrom a check so that when a new record is created the dateAtAddress must be in the past. I have tried the following code when creating the table

dateAtAddress date,
CHECK
dateAtAddress <= DATE_SUB(CURRENT_DATE, INTERVAL 0 DAY);

But it still seems to be letting datesin the future be entered in as valid data in the field.

User Check
I want to add a new user but I donâ€™t know whether a user already exists
How can I check whether a user already exists?
This donâ€™t work
CREATE USER IF NOT EXISTS admin

Mysql: Check
Is there any possibility to check existing of autoextend option
for InnoDB ?
I mean by any sql command and not by searching in my.ini file ?

Syntax Check
Code:

SELECT (((b.close - a.close) / a.close) * 100) FROM `AAH` a, `AAH` b WHERE b.date = '2007-01-03' AND a.date = '2007-01-02'

and said error:

Quote: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'b.close - a.close) / a.close) * 100) FROM `AAH` a, `AAH` b WHERE b.date = '2007-' at line 1
it is supposed to retrieve and calculate the percent change for the closing prices of a symbol on a particular stock market. Not sure what the exact error is.

Date Check Constraint
I'm trying to tack on a check constraint to make sure that when a check-out date is added, to make sure the check-in date is <= the check-out date. A simple inequality throws an error. What would be the correct way to handle this?

Create table maintenance(
mid char(5) primary key not null,
cid char(5) not null references cars(cid),
pid char(5) not null references people(pid),
check_in_date date not null,
check_out_date CHECK (check_in_date<= check_out_date),
milage int not null CHECK(milage>=0),
service_description varchar (255),
UNIQUE(mid)
);

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CHECK (check_in_date<= check_out_date), milage int not null CHECK(milage>=0), ' at line 6

Check If Column Exists
I want to check if a column exists in a select statement. I've done searches on google and have not found what I need.

If a column exists, include the column in the query, else not. Here's an example of what I might want to do, but it doesn't work:

select cat_title, if(column_exists('subhead')) then subhead from wf_category where cat_id=5

I know I can do a separate select statement to check for this, but I'd rather save the overhead and do it all in one statement.

Check For Duplicate Fields?
I have a product table, alot of the information can be the same for 2 different products but the one thing that absolutely differs them is the style number. Theres alot of products on the site and its hard to keep track of all of them. if there is no duplicates then every single field for the style number should be different. So If there was a duplicate product the style column would be the same in 2 or places. So what I am asking is if there is a way I can pull a field only if there is more than one occurance of it? Kinda like a SELECT DISTINCT in reverse. That way I can find diplicate products and remove them.

Actually an even better thing would be if there was a way I could set the table to reject any inserts if the style umber column is the same as one that already exists....but I dont know if thats possible either.

How Check How Long Did My Select Took ?
I have a client for mysql which give me the time it took to query but now is very doubtful. I have 2 machines on the same network accessing the same database one is showing 360ms and the other is showing 5469ms on the same select? Thus I am very confuse where can I verify which is the exact time ? Thanks.

I Want To Check That A String Is In A Field
I want to select everything where a specific short string, is in the actual field. Eg, if I use a search string of alpine, it will be 'in' the field value Alpine Forests, so I will select the field that contains Alpine Forests.

This is my SQL so far and it doesn't work

SELECT * from packages2_tbl WHERE (INSTR(model, LCASE('Alpine'))) AND product_active = 'yes' ORDER BY model ASC"
Has anyone got any ideas?

Is It Possible To Check For The First Chars In A Db - Column?
Trying to compare the first 4 chars with the first 4 chars in a db column ....

Check Before Insert Query
if (!empty($determin))
{
//do something when its not empty

$query = "SELECT * FROM `JS` WHERE `wrdnprc` LIKE '$mkrs' LIMIT 1";
$good_query=mysql_query($query) or die(mysql_error());

if (mysql_num_rows($good_query) == 1 )

{
echo "record found #2 ";
}
else
{
$query = "INSERT INTO `JS` ( `id` , `wrdprc` , `wrdnprc` , `pgld` ) VALUES ('', '$mkrs', '2', '0') ";
$query=mysql_query($query) or die(mysql_error());

echo "adding record #2 "; }
}
else
{
//its empty... lets whine about it
echo "no ";
}

most of the work is being done, which is good thing BUT the query will INSERT regardless of the if good_query statement.

Check If Field Already Exist
How can I check if a field already exist in a table? If it doesn't exist I want
to add it with ALTER TABLE ADD...

UPDATE Syntax Check
Can someone check this for syntax errors because I it won't execute without an error:

CODEUPDATE pages SET NAME='index', GROUP='all', HITS='1', HTML='This is just the index page from the MySQL database! Congrats, so far so good!', HTTPS='0' WHERE NAME = 'index'

CHECK CONSTRAINT On A Column
I am not familiar with MySQL, but we are currently looking at it. Currently our software product supports Oracle, DB2, and we want to see what it takes to also include MySQL.

One stumbling block we have come across is that it seems that the CREATE TABLE command does not support the CHECK CONSTRAINT on a column. I know there is such a thing as the ENUM column in MySQL, but what if we want to set the constraint between two values.

Example:

CREATE TABLE TMPTABLE
COLONE CHAR(10),
COLTWO INT CHECK (COLTWO BETWEEN 1 AND 200)....

Is there such a thing in MySQL.

Check If An Entry Exists
I have a table which records information on ratings that each user has given each movie, it looks a little like this:

Table = USER_VOTES

USER_ID MOVIE_ID VOTE
1 2 5
2 3 5
3 4 5
3 5 5
4 3 5

I an using a simple SELECT command to find if a user has already voted, ie. if a row already exists with their USER_ID and MOVIE_ID. I am having a little trouble with this SELECT statement and wonder if there is a better way of doing this simple check. My code looks like this:

$sql = "SELECT vote FROM user_votes WHERE movie_id='$id' && user_id='$usrID'";
if ($result = mysql_query($sql, $db)) {
//if vote already exists display error
$error = "You have already voted for this moive
(your rating was ".mysql_result($result,0,"vote").").";
} else {
//if no vote exists process vote...
}

If a user has not voted before I get an error like this:
Unable to jump to row 0 on MySQL result index 2

To me it appears that mysql_query() does not return false when no results are found. Is there a command which does check results and return false or is there a much easier way to check, perhaps there could be some checking code in the actual SQL query?

MySQL Error For CHECK?
I am getting an error with this query:

SELECT last_name,total,paid_on,check,value,first_name,status,report_by_agents.id FROM report_by_agents LEFT JOIN agents ON agents.id = report_by_agents.agent_id LEFT JOIN transactions ON transactions.report_id = report_by_agents.id WHERE date_format(report_by_agents.stamp, '%M %Y') = '' && suspended>NOW() AND ( last_name LIKE '%' ) ORDER BY last_name ASC LIMIT 0,50

The error is:
You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'CHECK , value, first_name,
STATUS , report_by_agents.id
FROM r

Is CHECK a reserved keyword? When I put a single quotes for check, it works fine. But I am not sure if it means the same thing.

Check Username Case
I have a query about checking the case of a username.

If i have a username TEST, if i enter in TEST or test the result from sql is true. I can check it in the program itself but is there a way to do it in SQL.

How To Check Mysql's Logfile?
Is the file ib_logfile1 in the data directory mysql's log file? I used mysqlbinlog but it says it's not a binary file.

How Do I Check For Missing Records?
I have nearly 10,000 records in my database so it would be impossible to check to see if all of the records are in the database if I checked by hand. I have an integer field in my db called Lnum which I created using excel. The purpose of the Lnum field was to give me a reference and numbering field in the spreadsheet work.

I carried the Lnum field over into the db. The Lnum field has integers numbered for the most part sequentially. A few numbers are repeated. What I want to check for is whether there are any missing records in the database by checking to make sure there are no numerical gaps between Lnum = 1 and Lnum = 99,500.

If there is a numerical gap in the Lnum sequencing, this means I have a missing record or records. Is there a way to use the Lnum field to find missing records, possibly by adding an incrementally numbered field?

How To Check For Errors In MySQL?
How do you check for errors in the MySQL database? The MySQL database on my site works, but frequently causes the server to crash.

I wanted to know what errors it has. How can I check it? Is their a MySQL validator like their is an RSS Validator or a Java Validator?

Implementing The CHECK Clause`
I am working with mySQL version 4.1.14-max on an Apple Mac. I have been tring to finish up a homework assignment to create the following domain:

CREATE DOMAIN Id INTEGER CHECK ( VALUE > 999 AND VALUE < 99999);

and can't seem to get it to work. I also try addeding the CHECK clause directly into the table, which worked. But, the table is not enforcong the range requierments. After searching the web, I found that mySQL will parse and ignore the CHECK clause when used with CREATE TABLE. So, I have no idea how to restricted the range on the Id attribute.

Check If A Table Has Been Updated
I'd like to find a way to check if any modifications has been made to a table. I'm using mysql 4.1. I'm trying to find the least resource intensive method of doing this.

Check For Unused Fields.
I have a 6+ years old db, and over time evolution has taken its toll, how can I find out now if I have any unused fields.

(we do trim the DB weekly, but with 3mil+ records and 33 fields, I could use some way of quick checking.

I can eliminate a few but am left with I guess about 12 fields (none indexed), with a multitude of apps (web, perl, remote server etc) I cant check all of the source code.

Check For Duplicate Databases
I have a program that I am writing in PHP/MySQL. I have made some upgrades
to the database and like an idiot, forgot to write down the changes or to
make the changes in several other databases for the other clients that are
using the program also. What I am trying to do is to have a program,
(preferably in PHP) that will look at the structure of the main database
that I changed, then it will check the other databases to make sure that
the structure is identical and if not, it will change them to make them
identical. Is there a program already out there that would do this?

Check Table For An Entry?
I'm currently working on some rudamentry administration, namely an IP ban list. I want to make it so that if the user trys to ban an IP that is already in the list, the entry will be removed instead. what would be the best way to go about this?

Duplicate Records Check
Could any one advise what SQL statement I would need to use, to check a
table for any duplicate records e.g that contain the same data within a
field. Note that I haven't got the field as a unqiue field.

Check Which Server Running
i'd like to know how control which server is actually running between mysqld and mysqld-max.

Check For Duplicate Data
I am having a problem sorting duplicate data within a table. I have a table called Employee that contains EmployeeID, EmployeeName, PhoneNumber. This table contains duplicate data. I now have a problem with 2 different users with the same EmployeeID 'abc'.

I wondered if there is a way to write a select statment to delete one of the users with same id. I have tried doing a few things with DISTINCT but I could not get the EmployeeID and 2 EmployeeNames to filter out.

Check For Inconsistency In Mysql DB
I have been assigned with the task of developing a java class to check for inconsistency in a DB in our firm.I was thinking I could rush over this using a trigger,but honestly,my whole idea flopped.

Check And Alert If Not Unique
I have some columns in my database that are set to unique.

How would I structure my query so it can recognize and tell the user instead of just not storing the data?

I wasn't sure to post this in mysql or php. sorry if it should have been in php.

Check If Table Exsists
Am creating an install.php page to create the tables for a database. After running the code I want to make sure the tables were created, how do you check is a table exsists in mysql?

Check If Record Exists
is there a quick and easy way to check if a record exists?
At teh moment I do a select statement then count the rows retrieved, if its greater than 0 I know a record exists. Anyone know of a simpler way or is this it?

Check Existing Values
In my web site I'm using PHP, & MySQL.
There its needed if a user is trying to be registerd using a existing user ID.
That is I think, it should check such a value existing and if exists it must display "Existing User ID".

Programmatically Check Values
I'm completely new within MySQL. I've just used Microsoft Access. Right now, I have to develop a database to store a lot of data. I've heard that it is possible to consult these data with the internet explorer programming a webpage with PHP. Is there some example about it? Is this PHP free to download? Where can I get it?

Check If A Table Exists
is there any way to check if a table exists in mysql? i am using a graph program in vb, but if the table it is trying to graph doesnt exist it breaks down! i need some sort of check so as the offending table will not be added to the query if it doesnt exist?

Check For A Trigger Existence
how i can check to see whether a trigger exists and if it exists then delete it ?
can some one provide an example sql code for this ?

How Do I Upload A File To MySQL Database And View That File
I do not know how to upload a file to MySQL database and view the posting file on the webpage. I followed the code on-line that show me how to upload, but when I click "browse" to open my file in local drive and click "upload". Nothing happen ! How can I view it on the web page to make sure it was saved in data base.

Email Archive Check On Two Parameters
JPost.JobID - JobPosts primary (job postings)
Seek.SeekID - Seekers primary (job seekers)
Res.ResID -Resumes primary (job seeker resumes)
Res.FK_SeekID - foreign to SeekID
JRun.JRunID - Runtime primary ( job posting runtimes)
JRun.FK_JobID - foreign to JobID
JRun.JobStartRun
JRun.JobEndDRun
SJobNotify.SJNID - email archive primary
SJobNotify.sjnFK_SeekID - foreign to Seek primary
SJobNotify.sjnFK_JobID - foreign to JPosts primary
My purpose and obstacle here has been a query to reflect all results except where a given SeekID has been notified of a JobID. (the SeekID could have other sjnFK_JobID/JobID notifications present - - but the query should return ONLY those JobID's not contained in SJobNotify.sjnFK_JobID per SeekID)
o SeekID may or may not be in SJobNotify.sjnFK_SeekID col but JobID CANNOT be present in the SJobNotify.sjnFK_JobID among query results)

How to show the JobID's that aren't here for a given SeekID while SeekID may or may not be present in SJobNotify.sjnFK_SeekID:

SJobNotify.sjnFK_JobID = JPosts.JobID
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Was hoping to Select only the primary id's aside from the JobStartRun and JobEndRun