SQL学习记录

# --数据查找（值） #
--调用 exec _FindValueInDB '关键字'
CREATE PROCEDURE [dbo].[_FindValueInDB] (@value VARCHAR(1024)) 
AS
BEGIN
    SET NOCOUNT ON;
    DECLARE @sql VARCHAR(1024) 
    DECLARE @table VARCHAR(64) 
    DECLARE @column VARCHAR(64) 
    CREATE TABLE #t (tablename VARCHAR(64), columnname VARCHAR(64)) 
    DECLARE TABLES CURSOR FOR 
    SELECT o.name, c.name FROM syscolumns c  INNER JOIN sysobjects o ON c.id = o.id 
    WHERE o.type = 'U' AND c.xtype IN (167, 175, 231, 239)   ORDER BY o.name, c.name 
    OPEN TABLES 
        FETCH NEXT FROM TABLES 
        INTO @table, @column 
        WHILE @@FETCH_STATUS = 0 
        BEGIN 
            SET @sql = 'IF EXISTS(SELECT NULL FROM [' + @table + '] ' 
            SET @sql = @sql + 'WHERE RTRIM(LTRIM([' + @column + '])) LIKE ''%' + @value + '%'') ' 
            SET @sql = @sql + 'INSERT INTO #t VALUES (''' + @table + ''', ''' 
            SET @sql = @sql + @column + ''')' 
            EXEC(@sql) 
            FETCH NEXT FROM TABLES 
            INTO @table, @column 
        END 
    CLOSE TABLES 
    DEALLOCATE TABLES 
    SELECT * FROM #t 
    DROP TABLE #t 
End

# --根据列名找表名 #
select   a.name   表名,b.name   列名   
from   sysobjects   a,syscolumns   b   
where   a.id=b.id   and   b.name='unitid'   and   a.type='U'

# --统计表数据行数 #
select t.name as TableName,i.rows as RowCount
from sys.tables as t, sysindexes as i
where t.object_id = i.id and i.indid <=1