if else syntax in sql

PL/SQL script language value assignment statement syntax table and record comply with the type usage, select the statement if else usage anonymous block (1), assign value statement syntax PL/SQL values use: = "=" some rules need to be observed in

Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other ' end--case search function case when sex = ' 1 ' Then ' man ' when

MySQL is the most basic SQL syntax. For more information, see. The most basic SQL syntax/Statement of MySQL. For more information, see. DDL-Data Definition Language (Create, Alter, Drop, DECLARE) DML-data manipulation language (Select, Delete,

MySQL's most basic SQL syntax/statementMySQL's most basic SQL syntax/statement, using MySQL friends can refer to below. ddl-Data Definition language (create,alter,drop,declare)dml-Data Manipulation Language (Select,delete,update,insert)dcl-Data

ddl-Data Definition language (create,alter,drop,declare)dml-Data Manipulation Language (Select,delete,update,insert)dcl-Data Control Language (Grant,revoke,commit,rollback)First, a brief introduction to the underlying statement:1. Description:

Required SQL syntax and statement DDL-Data Definition Language (create, alter, drop, declare)DML-data manipulation language (select, delete, update, insert)DCL-Data Control Language (Grant, revoke, commit, rollback) 1. First, briefly introduce the

ddl-Data Definition language (create,alter,drop,declare)dml-Data Manipulation Language (Select,delete,update,insert)dcl-Data Control Language (Grant,revoke,commit,rollback)First, a brief introduction to the underlying statement:1. Description:

ddl-Data Definition language (create,alter,drop,declare) dml-Data Manipulation Language (Select,delete,update,insert) dcl-Data Control Language (Grant,revoke,commit,rollback) First, briefly introduce the underlying statement: 1, Description:

CASE has two formats:The simple CASE function compares an expression with a group of simple expressions to determine the result.The CASE search function calculates a group of Boolean expressions to determine the result.Both formats support the

DDL-Data Definition Language (Create, Alter, Drop, DECLARE)DML-data manipulation language (Select, Delete, Update, Insert)DCL-Data Control Language (GRANT, REVOKE, COMMIT, ROLLBACK)First, we will briefly introduce the basic statements:1. Description: