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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. 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:

  3. www.geeksforgeeks.org › mysql-if-if-then-if-then-else-and-if-then-elseif-elseIF, IF-THEN, IF-THEN-ELSE and IF-THEN-ELSEIF-ELSE Statement -...

    21 sie 2024 · The IF-THEN statement in SQL is used to execute a block of code if a specified condition is true. If the condition evaluates to true, the code within the THEN block is executed. If the condition is false, the block is skipped. Syntax: IF condition THEN. statements; END IF; Parameters Used:

  4. www.mysqltutorial.org › mysql-stored-procedure › mysql-if-statementMySQL IF Statement - MySQL Tutorial

    Use IF...THEN...ELSEIF...ELSE statement to evaluate multiple conditions sequentially and execute corresponding blocks of statements based on the first true condition, with an optional block of statements to execute if none of the conditions is true.

  5. www.slingacademy.com › article › using-if-then-statements-in-mysql-8Using IF…THEN Statements in MySQL 8 - Sling Academy

    26 sty 2024 · The IF…THEN statement in MySQL allows you to execute a block of SQL code if a condition is true. The basic syntax for the IF…THEN construct is as follows: BEGIN . IF condition THEN -- Statements to execute if the condition is true END IF; END;

  6. dba.stackexchange.com › questions › 60417mysql - Update DATE field when another field in the same table...

    A Trigger can't update another row of the same table as the row the trigger was called from. The typical way to do that is to create a stored procedure which inserts into/updates the target table, then updates the other row(s), all in a transaction.

  7. stackoverflow.com › questions › 12754470MySQL update CASE WHEN/THEN/ELSE - Stack Overflow

    6 paź 2012 · UPDATE `table` SET uid = CASE id WHEN 10 THEN 2952 WHEN 20 THEN 4925 WHEN 30 THEN 1592 END CASE WHERE id IN (10, 20, 30) or the simpler: UPDATE `table` SET uid = ELT(FIELD(id, 10, 20, 30), 2952, 4925, 1592) WHERE id IN (10, 20, 30) As FIELD() returns the index (position) of str in the str1, str2, str3, ... list. Returns 0 if str is not found.

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