ENDends theCASEstatement ASspecifies the namealias_namefor the new column tableis the name of the table. Note:The syntax ofCASEalways starts with theCASEkeyword and ends with theENDkeyword followed by a column name alias. Example: Voter Eligibility Using SQL CASE -- add a new column 'can_v...
1topics: #CASE的两种基本用法2CASE OPERATOR3CASE STATEMENT45MariaDB [mysql]> helpcasestatement; #case的第一种用法6Name: 'CASE STATEMENT'7Description:8Syntax:9CASE case_value10WHEN when_value THEN statement_list11[WHEN when_value THEN statement_list] ...12[ELSE statement_list]13END CASE1415Or...
sql case statement
Simple Case Statement CASE [input_expression] WHEN when_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END Search Case Statement CASE WHEN Boolean_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END ...
The simple CASE statement has the following structure: CASE selector WHEN selector_value_1 THEN statements_1 WHEN selector_value_1 THEN statement_2 ... ELSE else_statements END CASE; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) Let’s examine the syntax of the simple CASE ...
SQL CASE Syntax 1 2 3 4 5 CASE case_value WHEN when_value THEN statement_list [WHEN when_value THEN statement_list] ... [ELSE statement_list] END CASECASE 搜索条件1 2 3 4 5 6 7 SELECT OrderID, Quantity, CASEWHEN Quantity > 30 ...
...UPDATE salary SET sex = IF(sex = 'm', 'f', 'm') 也可以利用条件语句,在搜索的时候,直接进行数据转换 select *,(CASE WHEN sex='1'...参考资料: 1、Mysql if case总结 2、Leetcode swap salary 3、select case when if 的一些用法 4、IF Syntax...
Posted Procedure : CASE statement using SQL 4235 Tarun Bajaj September 04, 2012 02:28PM Re: Procedure : CASE statement using SQL 1269 Rick James September 05, 2012 09:16PM Sorry, you can't reply to this topic. It has been closed....
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 ...
Posted Procedure : CASE statement using SQL 4231 Tarun Bajaj September 04, 2012 02:28PM Re: Procedure : CASE statement using SQL 1269 Rick James September 05, 2012 09:16PM Sorry, you can't reply to this topic. It has been closed....