MySQL (C API)VC執行個體及代碼下載 （1）_PHP教程

1.說明：複製表(只複製結構,源表名：a 新表名：b)

SQL: select * into b from a where 1<>1

2.說明：拷貝表(拷貝資料,源表名：a 目標表名：b)

SQL: insert into b(a, b, c) select d,e,f from b;

3.說明：顯示文章、提交人和最後回複時間

SQL: select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b

4.說明：外串連查詢(表名1：a 表名2：b)

SQL: select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUTER JOIN b ON a.a = b.c

5.說明：排程提前五分鐘提醒

SQL: select * from 排程 where datediff('minute',f開始時間,getdate())>5

6.說明：兩張關聯表，刪除主表中已經在副表中沒有的資訊

SQL:

delete from info where not exists ( select * from infobz where info.infid=infobz.infid )

說明：--

SQL:

SELECT A.NUM, A.NAME, B.UPD_DATE, B.PREV_UPD_DATE

FROM TABLE1,

(SELECT X.NUM, X.UPD_DATE, Y.UPD_DATE PREV_UPD_DATE

FROM (SELECT NUM, UPD_DATE, INBOUND_QTY, STOCK_ONHAND

FROM TABLE2

WHERE TO_CHAR(UPD_DATE,'YYYY/MM') = TO_CHAR(SYSDATE, 'YYYY/MM')) X,

(SELECT NUM, UPD_DATE, STOCK_ONHAND

FROM TABLE2

WHERE TO_CHAR(UPD_DATE,'YYYY/MM') =

TO_CHAR(TO_DATE(TO_CHAR(SYSDATE, 'YYYY/MM') || '/01','YYYY/MM/DD') - 1, 'YYYY/MM') ) Y,

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