상용 sql 문장 정리

1. 저장 프로세스

CREATE PROCEDURE [dbo].[bbs_move_createtopic]
@fid smallint,
@iconid smallint,
@curtid INT OUTPUT
AS
BEGIN
    INSERT INTO [topics] ......
    SET @topicid=SCOPE_IDENTITY()
END

 

declare @curtid int
exec [createtopic] @fid=@new_fid,@iconid=0,
    @curtid=@curr_topicid OUTPUT

 
2. 커서

    DECLARE
        @name NVARCHAR(100),
        @id DECIMAL,
        @idcard NVARCHAR(100)=NULL
    
    --    
    DECLARE cur_correctIdCard CURSOR
    FOR
    SELECT 
    ID, NAME, [USER_ID]
    FROM dbo.old_bbstitle 
    WHERE (USER_ID IS NULL OR LTRIM(NAME)='') 
    OR (NAME IS NULL OR LTRIM(NAME)='')
    --    
    OPEN cur_correctIdCard
    --  FETCH
    FETCH NEXT FROM cur_correctIdCard INTO @id,@name,@idcard
    
    --0 FETCH     
    --1 FETCH              
    --2         
    WHILE(@@FETCH_STATUS=0) 
    BEGIN
        ... ...
        
        FETCH NEXT FROM cur_correctIdCard INTO @id,@name,@idcard
        SET @idcard=NULL
    END
    
    CLOSE cur_correctIdCard
    DEALLOCATE cur_correctIdCard

3. 테이블 데이터 복사

SELECT * INTO users_bak FROM users

4. group by … having …

DELETE
FROM dbo.old_clubuser WHERE CLUBUSER_ID
IN(
SELECT MIN(CLUBUSER_ID) FROM dbo.old_clubuser WHERE CLUBUSER_NAME IS NOT NULL AND CLUBUSER_NICKNAME IS NOT NULL
GROUP BY CLUBUSER_NAME,CLUBUSER_NICKNAME
HAVING COUNT(CLUBUSER_NAME)>1
)

5. 트랜잭션

BEGIN TRANSACTION trans_correctIdCard
BEGIN TRY
    DECLARE
        @name NVARCHAR(100),
        @id DECIMAL,
        @idcard NVARCHAR(100)=NULL

    COMMIT TRANSACTION trans_correctIdCard
    PRINT 'SUCCESS'
END TRY
BEGIN CATCH
    
    ROLLBACK TRANSACTION trans_correctIdCard
    
    PRINT '  ：'+CAST(@@error AS NVARCHAR(MAX))
    PRINT '     '

END CATCH

5. 표의 존재 여부를 판단하고 표를 만든다

--       ，      
IF object_id(N'dbo.T_Student',N'U') IS NOT NULL
DROP TABLE dbo.T_Student
GO

--   
CREATE TABLE [dbo].[T_Student](
 [Id] [int] IDENTITY(1,1) NOT NULL,
 [Name] [nvarchar](max) NULL,
 [Age] [int] NOT NULL,
 [NickName] [nvarchar](max) NULL,
 [City] [nvarchar](max) NULL,
 CONSTRAINT [PK_dbo.T_Student] PRIMARY KEY CLUSTERED ([Id] ASC)
)

6. SQL Server 테이블 구조 가져오기

SELECT (case when a.colorder=1 then d.name else null end)   ,  
a.colorder     ,a.name    ,
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end)   , 
(case when (SELECT count(*) FROM sysobjects  
WHERE (name in (SELECT name FROM sysindexes  
WHERE (id = a.id) AND (indid in  
(SELECT indid FROM sysindexkeys  
WHERE (id = a.id) AND (colid in  
(SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name)))))))  
AND (xtype = 'PK'))>0 then '√' else '' end)   ,b.name   ,a.length      ,  
COLUMNPROPERTY(a.id,a.name,'PRECISION') as   ,  
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as     ,(case when a.isnullable=1 then '√'else '' end)    ,  
isnull(e.text,'')    ,isnull(g.[value], ' ') AS [  ]
FROM  syscolumns a 
left join systypes b on a.xtype=b.xusertype  
inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties' 
left join syscomments e on a.cdefault=e.id  
left join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_id
left join sys.extended_properties f on d.id=f.class and f.minor_id=0
where b.name is not null
--WHERE d.name='     ' --        ,     
order by a.id,a.colorder

(출처:http://www.cnblogs.com/ynbt/archive/2012/07/16/2593389.html)
7. 데이터베이스에 있는 모든 데이터베이스 이름 조회

SELECT Name FROM Master..SysDatabases ORDER BY Name

8. 어떤 데이터베이스에 있는 모든 테이블 이름을 조회

SELECT Name FROM SysObjects Where XType='U' ORDER BY Name

9. 라이브러리의 테이블을 대량으로 비운다(1)

SELECT 'TRUNCATE TABLE ' + Name FROM SysObjects Where XType='U' ORDER BY Name

10. 라이브러리의 테이블을 대량으로 비우기(2)

    USE [  ]
    DECLARE
        @tableName NVARCHAR(100)
    
    --    
    DECLARE CUR_ALLTABLES CURSOR
    FOR
    SELECT Name FROM SysObjects Where XType='U' ORDER BY Name

    --    
    OPEN CUR_ALLTABLES
    --  FETCH
    FETCH NEXT FROM CUR_ALLTABLES INTO @tableName
    
    DECLARE @SQL VARCHAR(MAX) = ''

    --0 FETCH     
    --1 FETCH              
    --2         
    WHILE(@@FETCH_STATUS=0) 
    BEGIN
        
        SET @SQL = 'TRUNCATE TABLE ' + @tableName
        PRINT @SQL

        FETCH NEXT FROM CUR_ALLTABLES INTO @tableName
    END
    
    CLOSE CUR_ALLTABLES
    DEALLOCATE CUR_ALLTABLES

 11. 행렬 전환의 예

WITH CTE AS (
    select 1 as    ,'2010-2-3' as   ,' ' as  
    union all
    select 2 as    ,'2010-2-3' as   ,' ' as  
    union all
    select 3 as    ,'2010-2-4' as   ,' ' as  
    union all
    select 4 as    ,'2010-2-4' as   ,' ' as  
    union all
    select 5 as    ,'2010-2-3' as   ,' ' as  
    union all
    select 6 as    ,'2010-2-3' as   ,' ' as  
    union all
    select 7 as    ,'2010-2-4' as   ,' ' as  
)
SELECT   , SUM( )  , SUM( )   FROM (
    SELECT   , 
    CASE WHEN  =' ' THEN 1 ELSE 0 END AS  ,
    CASE WHEN  =' ' THEN 0 ELSE 1 END AS   FROM CTE
)A GROUP BY   

12.