JavaEE.sql.Select查询语句

Posted 2021-02-07 zhen

SELECT语句

语法格式

//选择字段 SELECT column1, column2, ... FROM table_name; //全表   SELECT * FROM table_name;

S1.全表查询

SELECT      * FROM      test_master

S2.选择查询

SELECT      id,      userName,      bindNo FROM      test_master

S3.连表查询

SELECT      m.id,      m.userName,      m.bindNo,      s.registerDate FROM      test_master m,      test_slave s WHERE      m.bindNo = s.bindNo

ref

https://www.w3schools.com/sql/sql_select.asp http://www.runoob.com/mysql/mysql-select-query.html