2 Transact-SQL

Transact-SQL 1 ?Structured Query Language[]

Transact-SQL 1DDLDDL:CREAT TABLE/**/ALTER TABLE/**/DROP TABLE/**/2DMLT-SQLDMLSELECT/**/DELETE/**/INSERT /**/ UPDATE/**/3DCLGRANT/**/ REMOVE/**/

SELECTSELECTSELECT FROM WHEAR Student00000001StuName01

1*2DISTINCT3TOP n [PERCENT]6

41 23AS

5 SQL Server 001 001

6WHERE001Linux7SELECT

8ORDER BYORDER BY

9INNOT IN001004013OR IN

1LIKENOT LIKE%0_[][m-p][^][^m-p][^mnop]D%_[^a][[][%]DLIKENOT LIKE

2IS NULL

3BETWEENANDNOT BETWEENAND3040BETWEENAND[]WHERE WillNum BETWEEN 30 AND 403040NOT BETWEENANDWHERE

4UNION12[]12

5COMPUTE[] WHERE12COMPUTE[]AVG()MAX()MIN()SUM()SELECTPAGE 392.10[]12

6COMPUTEBY[]ORDER BYCOUNT

COMPUTEBY

1GROUP BY[]1GROUP BYWHERE2GROUP BYSELECTSELECTGROUP BY

2HAVING[]HAVINGGROUP BYWHEREHAVINGWHERE[]HAVINGGROUP BY3001

3STEP 1STEP 2

SQL SELECT

2 USE XkGOSELECT *FROM Department, ClassGO54318523

: [] 1DepatNoWHERENN-123

01[] WHERE[]SELECT.

1

2[]2.5

1234

EXISTS[]EXISTS[]TRUEFALSE

NOT EXISTS 001select stuno,stunamefrom studentwhere not exists(select * from stucouwhere stuno=student.stuno andcouno='001')

EXISTS