How To Write Query To Compare Tables
I give in. I can't figure it out, and I know it's one of those things that once I see it I'll think, "OF COURSE!". I have 2 tables, same DB. Table 1 is named Policies Table 2 is named Assignments Both contain a PolicyID field. I want to find out which PolicyID entries are ONLY in Policies, and not in Assignments. So if "Select PolicyID from Assignments" returned the following: 1, 2, 3, 4, 5, 6 And "Select PolicyID from Policies" returned: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 What do I use to return this? 7, 8, 9, 10 Any nudge, help, clue, etc. would be appreciated. I've looked thru examples of Outer Joins, Inner Joins, Lefts, Rights, Unions, Intersects, etc. and can't figure out which to use, all for what seems to be a simple operation!
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Best Way To Write This Query
Query 1: obtains results in boolean mode from products table based on keywords Query 2: Would like to grab all manufacturers names from manufacturers table based on mf_id in products table to then create a brand filter. What is the best way to do this in the most efficient query possible. I was thinking of building a php array from query 1 of mf id's and the putting them in query 2 and separating them using OR operators. any ideas? here is the query fyi: PHP $sql = "SELECT products_id as prodid, products_name as name, manufacturers_id as manufacturers_id, products_price as price, products_msrp as msrp, products_date_added as pda, products_status as status, products_sku as sku, products_weight as weight, categories_id as cat_id, " .boolean_sql_select( boolean_inclusive_atoms($search_string), $fulltext_key)." as relevance " ."FROM $table_name " ."WHERE " .boolean_sql_where($search_string,$fulltext_key)." " ."HAVING relevance>0 "; if (isset($HTTP_GET_VARS['sort'])) { if ($_GET['sort']=="brand") { $sql.="ORDER BY products_name "; } elseif ($_GET['sort']=="size") { $sql.="ORDER BY products_weight "; } elseif ($_GET['sort']=="price_low") { $sql.="ORDER BY products_price ASC "; } elseif ($_GET['sort']=="price_high") { $sql.="ORDER BY products_price DESC "; } elseif ($_GET['sort']=="fav") { $sql.="ORDER BY products_name "; } } else { $sql.="ORDER BY relevance DESC "; }
Compare Tables
Does anyone know if there is any tool that can compare two databases (and the tables) and allow you to create the SQL necessary to make them identical? I.e. creating new tables, adding columns,
Compare Two Tables
I have two tables. First table is just list of dealers (table name dealers) Second table is user input of dealers transactions.(Table name is log) The first field of table two is the dealership name (field name is dealership). Sometime not all dealers in the first table perform transactions. How can show the dealers that are listed in the first table that are not listed in the second table. I tried this, but it did not work select dealers from dealers, log where dealers != dealership
How To Compare 2 Tables ?
I have two tables containing references and I would like to compute the differences but I have some problems. For example table 1 +--------+ | ref | +--------+ | A250 | | B260 | | G650 | | D250 | +--------+ table 2 +--------+ | ref | +--------+ | A250 | | B280 | | Z650 | | D250 | | W650 | +--------+ SELECT table1.`ref` FROM table1, table2 WHERE table1.`ref` NOT LIKE table2.`ref` group by table1.`ref` ; does not compute corectly the différences. On the other end : SELECT table1.`ref` FROM table1, table2 WHERE table1.`ref` LIKE table2.`ref` group by table1.`ref` ; computes correctly the comon references. So what is wrong in the first query ? What can I do to see the differences between my 2 tables ?.
How Do I Compare Two Tables?
I have two tables with the same columns.Table A and Table B. I would like to compare a column in bot tables and determine if there is an entry in A but not in B, also I'd like to determin if there is an entry in B but not in A. How would I do this?
Compare Tables
I am looking to figure out a way to compare two tables and show me what is different. One table is 'usertable'.This table contains 5 columns reference(key),tag,datatype,scantime,description. When I run my application,it takes a snapshoot of 'usertable' and create a temp table 'temptags'.Every couple of minutes I want to compare the two tables and determine what is different. Fist off,I want to compare the reference column of each table and determine if there is a new reference index or if any have been deleted.Then I want to look at all the other column and determin if any have changed. These two tables are located in different databases 'usertable' is located in 'user' database and 'temptags' is located in 'tags' database.
Compare Two Tables
there is a way to compare fields and rows in two tables and display the values that differ from each other. Example: I have a table called "products", and a table called "products_bak", with a few fields: id, name, quantity. "Products_bak" contains yesterdays values, and "products" contains todays updated values. "Products_bak.quantity" contains yesterday's stock, and "products.quantity" contains current stock. Is there a way to compare the two tables and get the differences. I would like to be notified that the stock has increased from 3 to 5 in the first row, and that the name has changed from "TestOld" to "TestNew".
Compare Two Tables
How can I compare two tables and receive only the entry that are not the same as the first table. Example: First Table (fruit); contain apple, orange, lemon and lime. Second table (remove); orange, lime. I need to have only apple and lemon as the result of my SQL SELECT.
To Re-write Complex Query With JOINS
I have a problem with one of the JOIN query here. Below is a brief description of the problem. tablename : test RecordId EffectiveDateothertableidvalue -------- ------------- ------------ ----- 12004-01-10110 22004-01-20120 32004-01-20270 42004-01-10280 52004-01-15110 62004-01-25310 Output : RecordId EffectiveDateothertableidvalue -------- ------------- ------------ ----- 22004-01-20120 32004-01-20270 62004-01-25310 Now I want to use a single SQL query to find a result where there exist one record for each unique "othertableid" where the record selected for the "othertableid" should be the recent one with regard to "EffectiveDate". That is from the above records, I want to select Records with "RecordId" = 2 and 3 because they are the recent one for "othertableid" = 1 and 2 respectively. Please be sure that I want to retrive all fields including "RecordId". The result should not depend on any other fields but "EffectiveDate" only. I am using MySQL 4.0.12 and it does not support "SUBQUERIES" which is now given support in latest MySQL edition. But I have read in the manual of MySQL that any "SUBQUERY" SQL statement can be written with proper "JOINS".
Can't Compare 2 Tables' Columns
For some reason, comparing 2 tables using the operator "<>" is not working but using the opposite operator "=" is returning the correct opposite results. I have 2 tables: wp_posts with a column called 'post_title' sas_products with a column called 'sas_product_id' Both 'post_title' and 'sas_product_id' contain the same type of data, a product ID. So if I do the opposite query from what I want, it works: SELECT ID FROM wp_posts, sas_products WHERE post_title = sas_product_id Results give me the 100 rows where the post_title and sas_product_id are equal. But, if I do the following query, I get 10,000+ results when I should just get 2. SELECT ID FROM wp_posts, sas_products WHERE post_title <> sas_product_id Can someone help explain what it is I am missing here?
Compare 2 Tables And Delete
i made a rookie mistake in my delete user code and now i got a problem that i still got challenges by the user in my database with the deleted user_id i have two tables set like so Table users contains one cell called user_id Table challenges contains two cells called challenge_to and challenge from - each contain a user_id i need to get all the user_id `s from the users table and then delete all challenges that contain a user_id not in the list
Compare Fields Tables
I would like to compare two tables, in both tables there is an user field called "user" (table_1.user, and table_2.user). Thee is however a small problem, in table_1 the users are inserted like this: 235463 and in table_2 the users where inserted like this: p235463! Would it still be possible to compare this fields in some way (By using only the numbers maybe? But how?)
Compare 2 Tables ( <> Operation )
I have a small problem in comparing two tables, that has to return records that are not in the other table. Suppose I have the following tables: T1: T2: Field1 Field1 ------ ------- 1 b 2 a d c a 1 x z And, this is the code: select T1.Field1 from T1, T2 where T1.Field1 <> T2.Field1 group by T1.Field1 I was expecting the result of 2, d, x, z (which are not in T2). Instead, I got all 6 records from T1. I've tried other operation like !=, NOT IN, but came up the same. The Field1 on T1 is primary key.
Compare And Get Result From Two Tables
I'm trying to compare the id from the users table to the id of the white_player in the games table, and provide me with the users name. I think I am close, but unsure of how to actually get the result. Pretty sure the query is good, but not sure what the second line should look like. $wplayer = mysql_fetch_object(mysql_query("SELECT ".$this->settings->mysql_prefix."users.nick," .$this->settings->mysql_prefix."users.id," .$this->settings->mysql_prefix."game.white_player from ".$this->settings->mysql_prefix."users ".$this->settings->mysql_prefix."game WHERE " .$this->settings->mysql_prefix."users.id = " .$this->settings->mysql_prefix."game.white_player ")); $wplayer = $wplayer->nick;
Compare Record In Two Tables
if there is an easy way to compare a row from table a, to a row in table b with the same structure/field names and return those fields which don't match?I have table_a storing the originally submitted applicant information,and table_b storing a version that can be changed. When a user makes a change I'd like to compare it to the original table to see what fields were changed, preferably without opening the row from both tables and going field by field in code to see if they match...
Compare 2 Tables And Update One If A Match.
I have two tables "contact_tbl" and "address_tbl". I have a query that compares the email addresses between the two. If a match is found I need to update a specific field in "contact_tbl" with a value of 'yes'. My query is: SELECT * FROM contact_tbl INNER JOIN address_tbl ON contact_tbl.email = address_tbl.email; This works and I get a nice result set showing records where the email addresses match. I now need to update a field "status" in contact_tbl when there is a match. Have been tinkering with this for a while but not sure of the syntax and placement for the UPDATE code.
Compare And Delete Or Insert Within Tables
I have a CSV file that contains addresses. I need to compare the csv file to a MySQL table (tbl_bl). Then if the addresses are not found in tbl_bl, I need to add the addresses to another table (tbl_wl) Only if they do not already exist in the tbl_wl table. I can create simple SQL queries but I'm not so sure about something this complex.
Compare Data Beetwen 2 Tables
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Flat File Load And Compare 2 Tables
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How To Write Query To Select The Max(version) For Each Unique File_name Record?
I am a MySQL newbie trying to write a query that selects file_name records possessing the highest numbered version for that unique file_name. I show sample data and two trial queries below. Logically I want to use max(version) as a constraint in a Where Clause. However, the max() function is not allowed directly in a where clause. I have contemplated a second table to track the max version for each file name. I would like to structure the data in an efficient manner for query performance when the data set grows to many thousands of unique file_name records with many hundreds of versions each........
Search And Write, Or Write And Recover?
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How Can I Compare Two Table Fields In One Query?
This is my problem: "SELECT * FROM a,b WHERE a.field LIKE b.field " --> this works "SELECT * FROM a,b WHERE a.field LIKE %b.field% " --> this works not My Question: Is it possible to compare two filds with the substitute symbol % if the fields are stored in different tables?
Compare Two Date Columns In Mysql Query
I have 2 date columns in my table. One grabs the date that the article was created. The 2nd is user-defined and is used to tell the site when to "auto-archive" the article. I need to compare the two date columns to each other in a query so that I know if there are any current articles that have not been auto-archived. I thought I could use something like: $query = "SELECT * FROM publications where date_full >= auto_archive"; But this doesn't work. Anyone got any ideas?
Compare 2 Tables And Find Rows Which Don't Match (was "Mysql Noob Question")
I have a products table and a products_description table. They both have products_id as primary key. However, products_description table has more products_id keys then the products table. How do i compare the 2 tables and show just the products_id that dont match from products_descripition table? SELECT products.products_id, products_description.products_id FROM products, products_description WHERE products.products_id != products_description.products_id; I tried that query but got some wierd results and also the results gave me 2 columns when I just want one.
Help Me Write This Join?
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How To Write This Select?
I'm having some troubles writing a select. I have the following tables: theater ------- - id - name movie ----- - id - name showtime --------- - id - theater - movie - from - to - schedule I would like to list all the theaters with all the available showtimes and movies. I tried to, but i didn't get the result i was expecting. Can somebody help?
How To Write This In MySQL?
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How Do I Write This Trigger?
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how to write the db of a mysql on one system onto a cd so as to copy that db to the mysql on another system. The 2 systems are not connected to each other.
Can't Write To File
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Cant Write Or Delete
I cant get my php script to insert or delete records into a mysql table. I can view them all fine but that's about it. I've checked the user permissions on mysql and have set them all to 'Y' incase that was the problem but still no joy. Can anyone suggest what the problem may be? I'm tried the usual RTFM but cant spot the problem
Write Data To Row With Via C API
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How To Write Like Comparison In Procedures?
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Using INSERT To Write To A Directory
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C- Program To Write To Myi , Myd File
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Cant Write Or Delete To Table
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MySql Write Vs Read
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I have a database with access as front end and Mysql as back end. I am gettting the following 'Write Conflict' Error. when i am on my order form, This form does has a subform where i enter all the products that are ordered. Could any one let me know what could cause this problem. I am the only one using the database as its still in the build stage Code:
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I am using mysql with the InnoDB engine. I wrote a perl script that first selects something from a table, and then updates a second table based on the select from the first table. I need to make sure that there is no read or write to the tables while my script performs the insert and update. I looked at http://dev.mysql.com/doc/refman/4.1/en/lock-tables.html and it says this: --------------------------------------------------------- If you are using a storage engine in MySQL that does not support transactions, you must use LOCK TABLES if you want to ensure that no other thread comes between a SELECT and an UPDATE. The example shown here requires LOCK TABLES to execute safely: LOCK TABLES trans READ, customer WRITE; SELECT SUM(value) FROM trans WHERE customer_id=some_id; UPDATE customer SET total_value=sum_from_previous_statement WHERE customer_id=some_id; UNLOCK TABLES; Without LOCK TABLES, it is possible that another thread might insert a new row in the trans table between execution of the SELECT and UPDATE statements. --------------------------------------------------------- However, I am using InnoDB and it DOES support transaction. So, does that mean that even if I don't lock my tables, it will still work? If not, what do I need to do?
Write A Script With Looping Constructs
I want to write a script to insert some rows in a database. The user of the script will login to mysql and paste the script at this point. Is there a way to use looping constructs, variables, etc. Iam thinking of a PL/SQL equivalent.
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