数据库查询表字段、表名以及表内容

一、查询表

1、oracle

SELECT * FROM all_all_tables WHERE table_name = '表名';

2、sqlserver

select * from sysobjects where name='表名'

二、查询表字段

1、oracle

SELECT owner, table_name, column_name

                  FROM all_tab_columns WHERE column_name='字段名'

2、sqlserver

select A.[name] AS TABNAME,B.name AS COLNAME from sysobjects A,syscolumns B

where A.id =B.id AND  B.name LIKE '%MAIN%'

三、查询表内容

1、oracle

SET SERVEROUTPUT ON SIZE 100000;

DECLARE

      match_count INTEGER;

      v_sql varchar2(2000);

    BEGIN

      FOR t IN (SELECT owner, table_name, column_name

                  FROM all_tab_columns

                  WHERE owner = 'xxxx'  ---schema

                and data_type LIKE '%VARCHAR%' ---datatype

            AND table_name NOT LIKE '%copy%' )LOOP

          match_count:=0;

          v_sql:=  'SELECT COUNT(*) FROM ' || t.owner || '.' || t.table_name || ' WHERE '||t.column_name||' = :1'; 

        ---  dbms_output.put_line( t.owner || '.' || t.table_name) ;

        EXECUTE IMMEDIATE v_sql INTO match_count USING '查询的内容';

        IF match_count > 0 THEN

          dbms_output.put_line( t.table_name ||' '||t.column_name||' '||match_count );

        END IF;

      END LOOP;

    END;

2、sqlserver

create PROCEDURE [dbo].[SP_FindValueInDB]

(

    @value VARCHAR(1024)

)       

AS

BEGIN

    -- SET NOCOUNT ON added to prevent extra result sets from

    -- interfering with SELECT statements.

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

exec SP_FindValueInDB '查找内容'