许多人在写SQL时都想用if，下面教你正确使用方法。 1、 先准备好待处理的数据，见下图所示。 2、 许多人使用时习惯在select语句中直接嵌入if条件，所示。 3、 在SELECT语句中，通常使用CASE来实现IF的功能，具体用法所示。 4、 随后即可得出if语句的执行结果 ...

Well, if you happen to be using Sql Server you can do that sort of thing in T-Sql. In Oracle, you can also accomplish the same thing using pl/sql. Either way i'd do it in a stored ...

Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier. Due to popular demand, we’re ...

Developers love database programming tips, tricks, and workarounds—especially those that slash development time or boost application performance. Here's a collection of such nuggets for developing SQL ...