Mysql 簡單查詢語句彙總

把一些mysql的經常使用語法進行下彙總

1.簡單語句

/*websites  表名   NAME alexa url country  字段*/
SELECT * FROM websites;                      /* 查詢表全部數據 */

SELECT NAME FROM websites;                   /* 查詢表字段數據 */

SELECT * FROM websites where name = "廣西";   /* 查詢表字段下條件數據 */

SELECT * from websites where name like "_o%"; /* 模糊查詢表下數據 */

SELECT * FROM websites where id BETWEEN "1" AND "5";    /* 查詢表下字段範圍數據 */

SELECT * FROM websites WHERE name in ("廣西","百度");    /* 查詢表字段下固定條件數據 */

SELECT DISTINCT country FROM Websites;                  /* 查詢去重值 */

SELECT * FROM Websites WHERE country = "CN" AND alexa > 50;  /*查詢表下範圍條件數據*/

SELECT * FROM Websites WHERE country = "USA" OR country="sh"; /* 查詢表下條件不一樣值 */

SELECT * FROM Websites ORDER BY alexa;                      /* 查詢表下值排序結果 */

SELECT * FROM Websites ORDER BY alexa DESC;                 /* 查詢表下排序結果降序 */

SELECT * FROM Websites LIMIT 2;      /* 查詢表下範圍數據 */

SELECT name as zzz from websites;    /*別名查詢表下數據*/

2.分頁

select _column,_column from _table [where Clause] [limit N][offset M]

select * : 返回全部記錄
limit N : 返回 N 條記錄
offset M : 跳過 M 條記錄, 默認 M=0, 單獨使用彷佛不起做用
limit N,M : 至關於 limit M offset N , 從第 N 條記錄開始, 返回 M 條記錄
實現分頁：

select * from _table limit (page_number-1)*lines_perpage, lines_perpage

或

select * from _table limit lines_perpage offset (page_number-1)*lines_perpage