This SQL Server tutorial explains how to use the SQL Server (Transact-SQL) CASE statement with syntax and examples. In SQL Server (Transact-SQL), the CASE statement has the functionality of an IF-THEN-ELSE statement. You can use the CASE statement within
I am wondering whether its possible to extract two seperate columns of data after a 'THEN' statement when using CASE For example Select country, CASE WHEN X>1 Then (code which allows 'A' in one column and 'B' in a second column)... END
CASE表达式是用来判断条件的,条件成立时返回某个值,条件不成立时返回另一个值。 语法: CASEWHENComparsionConditionTHENresultWHENComparsionConditionTHENresultELSEotherEND (注:各分支返回的数据类型需一致。) (注:when子句一定要有排他性,因为当when子句为真时,剩余的when子句会被忽略。) CASE表达式的用途: 1,转换...
TheCASE expressionis used to build IF … THEN … ELSE statements into your Microsoft SQL Server T-SQL code. CASE is used within a SQL statement, such as SELECT or UPDATE. Don’t mistake CASE for theIF ELSEcontrol of flow construct, which is used to evaluate the conditional execution of ...
Syntax for SQL Server, Azure SQL Database and Azure Synapse Analytics. syntaxsql -- Simple CASE expression:CASEinput_expressionWHENwhen_expressionTHENresult_expression[ ...n ] [ELSEelse_result_expression]END-- Searched CASE expression:CASEWHENBoolean_expressionTHENresult_expression[ ...n ] [ELSEels...
Update the operation ID with the V2 operation ID equivalent, then add the server and database parameters with the default value like instructed above. JSON 复制 "actions": { "Execute_a_SQL_query_[DEPRECATED]": { // ... "inputs": { "host": { // ... "operationId": "ExecutePassThr...
文章标签 服务器 PostgreSQL 数据库 文章分类 SQL Server 数据库 1 前言 1.1 概述 pgpool-II是位于PostgreSQL服务器和 PostgreSQL数据库客户端之间的代理软件,它提供了功能它连接池,负载均衡,自动故障转移,在线恢复等功能。本文介绍一种基于pgpool-II的方案,实现双机条件下,pgpool-II服务的高可用,PostgreSQL的高可用和负...
Note: Starting with SQL Server 2012 (11.x) Service Pack 3 and SQL Server 2014 (12.x) Service Pack 1, this behavior is controlled by the Database Engine and Trace Flag 1236 has no effect.Scope: Global only. 1237 Allows the ALTER PARTITION FUNCTION statement to honor the current user-...
Note: Starting with SQL Server 2012 (11.x) Service Pack 3 and SQL Server 2014 (12.x) Service Pack 1, this behavior is controlled by the Database Engine and Trace Flag 1236 has no effect.Scope: Global only. 1237 Allows the ALTER PARTITION FUNCTION statement to honor the current user-...
Tuning SQL via case when statement 原SQL如下:SQL的主要问题是红色部分居然通过标量查询,反复的查找与SQL相同的基表,很显然这个可以用case when来简化。 select a.TRAN_ID, a.AMOUNT, a.BALANCE, a.INVAMT, a.PROMISED, a.INVNO, a.RCLNUM, b.PROBLEM_ID,...