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IF(type = 'P', amount, amount * -1) as amount. FROM report. See https://dev.mysql.com/doc/refman/8.0/en/flow-control-functions.html. Additionally, you could handle when the condition is null. In the case of a null amount: SELECT id, IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as amount. FROM report.
28 Μαΐ 2024 · The CASE statement acts as a logical IF-THEN-ELSE conditional statement. We can use it to perform conditional branching within the SELECT statement across various SQL databases , including SQL Server, MySQL, and PostgreSQL .
21 Αυγ 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:
Use IF...THEN...ELSE statement to execute a block of statements if a specified condition is true and an alternative block of statements if the condition is false. 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 ...
10 Μαρ 2024 · This tutorial explains the usage of MySQL IF and IF ELSE Statements in Select queries with syntax and practical programming examples: MySQL provides an IF () function which is a flow control function and depending on the condition specified and its evaluation to true or false, the rest of the statement executes.
IF: ‘order_id’ in Table A matches ‘order_id’ in Table B. THEN: copy ‘sku’ from that Table A record to the record in Table B with the matching ‘order_id’. The data should be added to Table B ‘sku_copy'. I am using the following SQL trigger but it gives this error when it's run:
22 Απρ 2016 · This is described below. MYSQL select using if statement. select IF('fieldname with condition','if true value','if false value') from table_name where 1; MYSQL select using multiple if else. select. CASE. WHEN fieldname1 = 'value1' THEN 'if true then give value'. WHEN fieldname2 = 'value2' THEN 'if true then give value' THEN 'if true then give ...
