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  1. stackoverflow.com › questions › 2177543MySQL - Using If Then Else in MySQL UPDATE or SELECT Queries

    1 lut 2010 · Here's a query to update a table based on a comparison of another table. If record is not found in tableB, it will update the "active" value to "n". If it's found, will set the value to NULL. UPDATE tableA LEFT JOIN tableB ON tableA.id = tableB.id SET active = IF(tableB.id IS NULL, 'n', NULL)"; Hope this helps someone else.

  2. dba.stackexchange.com › questions › 135505mysql - Multiple Update with Multiple Conditions - Database ...

    16 kwi 2016 · UPDATE Tests SET TestScore = CASE WHEN TestId = 10 THEN 1000 WHEN TestId = 11 THEN 1100 END, TestScore2 = CASE WHEN TestId = 10 THEN 2000 WHEN TestId = 11 THEN 2100 END WHERE TestId IN (10, 11) But what happens when there two conditions required, namely the joint combo of (TestId, TestSubId)?

  3. dev.mysql.com › doc › refmanMySQL :: MySQL 8.4 Reference Manual :: 15.2.17 UPDATE Statement

    The WHERE clause, if given, specifies the conditions that identify which rows to update. With no WHERE clause, all rows are updated. If the ORDER BY clause is specified, the rows are updated in the order that is specified. The LIMIT clause places a limit on the number of rows that can be updated.

  4. dirask.com › posts › MySQL-UPDATE-query-with-IF-condition-conditional-update-pOv4JDMySQL - UPDATE query with IF condition (conditional update)

    In this article, we would like to show you UPDATE query with IF condition in MySQL. Quick solution: UPDATE `table_name` SET `column_name` = IF(condition , if_true, if_false); Practical example. To show UPDATE query with IF condition, we will use the following users table:

  5. stackoverflow.com › questions › 42390984MySQL If statement with multiple conditions - Stack Overflow

    22 lut 2017 · In a procedure the use of an IF is pretty straight forward: IF (yourCondition [logical operator(OR, AND) another condition] ) THEN. So in a practical example: .... DECLARE m integer; DECLARE n integer; SET m = 1; SET n = 0; IF ((m>n AND m=1 AND n=0) OR m=n)THEN.

  6. www.w3schools.com › mysql › mysql_updateMySQL UPDATE Statement - W3Schools

    The MySQL UPDATE Statement. The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. UPDATE table_name. SET column1 = value1, column2 = value2, ... WHERE condition; Note: Be careful when updating records in a table! Notice the . WHERE clause in the UPDATE statement.

  7. arstechnica.com › civis › threadsMySQL - UPDATE based on two conditional values | Ars OpenForum

    14 mar 2017 · #1. So I want to make an update in MySQL where a value is updated if two conditions are true. So I have data in columns name and status. If the name and status match foo and d, then I...

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