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