Summary: in this tutorial, you will learn how to use MySQL CASE statements to construct complex conditional statements inside stored programs. Besides the IF statement, MySQL provides an alternative conditional statement called the CASEstatement. The CASE statement makes the code more readable and ...
问MySQL Case语句，在‘Statement List’(语句列表)中返回多个行( Then...)EN需求： 同时：中文名重...
The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END. For the first syntax, case_value is an expression. This value is compared to the when_value expression in each WHEN clause until one of them is equal. When an equal when_value is ...
Context: Some months ago I inherited an application, with a rather unusual schema. However, we've not yet come around to refactoring it, this is due this summer. Until then, we'll have to makedo. We've altered some functionality in the application (RFC) and have to "migrate" some dat...
...= "" IF ELSE 流程控制语句 在mysql存储过程中的用法: IF search_condition THEN statement_list [ELSEIF search_condition...[ELSE statement_list] END IF IF作为一条语句,在END IF后需要加上分号“;”以表示语句结束,其他语句如CASE、LOOP等也是相同的。...= '' Swap Salary Leetcode中有一道题目就...
Bug #111301The query results in the CASE WHEN statement are inconsistent. Submitted:6 Jun 2023 14:44Modified:7 Jun 2023 12:55 Reporter:Chi ZhangEmail Updates: Status:Not a BugImpact on me: None Category:MySQL ServerSeverity:S3 (Non-critical) ...
MySQL The `CASE` expression in MySQL is used for conditional logic in SQL queries, allowing you to return specific values based on different conditions. It functions similarly to an if-else statement in programming languages. Usage The `CASE` expression is utilized to execute conditional logic wit...
Description: When using a subquery with a case when in the update statement, the updated data does not match the expected results returned by the subquery. How to repeat: 1、prepare data: drop database if exists select_test; create database if not exists select_test; create table if not ...
2Table and database names are stored on disk using the lettercase specified in theCREATE TABLEorCREATE DATABASEstatement, but MySQL converts them to lowercase on lookup. Name comparisons are not case-sensitive. This worksonlyon file systems that are not case-sensitive!InnoDBtable names and view...
, IN n_str varchar(30) , IN v_str varchar(30) ) BEGIN CASE n_str WHEN n_str = 'profileStatus' THEN UPDATE tbl_contact SET status = 'A' WHERE id = id; -- The above statement updates the entire table instead of the right row ...