sql case statement
We can add as manyWHEN ... THENconditions as required in theCASEstatement. For example, -- multiple CASE conditions in SQLSELECTcustomer_id, first_name,CASEWHENcountry ='USA'THEN'United States of America'WHENcountry ='UK'THEN'United Kingdom'ENDAScountry_nameFROMCustomers; Run Code Here, the...
1.CASE 写法如下: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 WHEN conditionN THEN resultN ELSE result END; 解释:1)先匹配第一条,不匹配的话继续第二条,如此循环,
搜尋的 case 陳述式: 用來根據表示式的值輸入部分邏輯 CASE 陳述式的 WHEN 子句定義當滿足時決定控制流程的值。 以下是具有含簡式 case-statement-when-clause 之 CASE 陳述式的 SQL 程序範例: CREATE PROCEDURE UPDATE_DEPT (IN p_workdept) LANGUAGE SQL BEGIN DECLARE v_workdept CHAR(3); SET v_workdept...
下面,看看MySQL的帮助信息,可以看到case的基本语法结构: 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...
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 ...
’ After that, using the ‘Created Date’ column you can set the date span (or build yourWHEREclause) to be everything after 2017-08-01. This will effectively build everything we need in an underlying query to create theCASE STATEMENTwe did above, in Atlassian Analytics’s Data Pipeline....
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 WHEN n_str = 'phoneNumberMobile' THEN UPDATE tbl_contact SET mobile_phone = v_str ...
SQL语句尚未结束(SQL_STATEMENT_NOT_YET_COMPLETE) 类08 - 连接异常 08000 连接异常(CONNECTION_EXCEPTION) 08003 连接不存在(CONNECTION_DOES_NOT_EXIST) 08006 连接失败(CONNECTION_FAILURE) 08001 SQL客户端不能建立SQL连接(SQLCLIENT_UNABLE_TO_ESTABLISH_SQLCONNECTION) 08004 SQL服务器拒绝建立SQL连接(SQLSERVER_REJ...
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 WHEN n_str = 'phoneNumberMobile' THEN UPDATE tbl_contact SET mobile_phone = v_str ...