Question

sql2008中如果需要查询一个数据库中所有表的所有字段包含一个字符串应该怎么写？

Answer 1

CREATE PROCEDURE [dbo].[findStringFromSys]
-- Add the parameters for the stored procedure
@StringName varchar(255)
AS
BEGIN

--1.定义需要查找的关键字。在搜索中，使用模糊搜索：LIKE '%@key_find%'
DECLARE @key_find NVARCHAR(MAX) = @StringName;--假设是找字符串"123"

--2.用游标Cursor_Table，遍历所有表
DECLARE Cursor_Table CURSOR FOR
SELECT name from sysobjects WHERE xtype = 'u' AND name <> 'dtproperties';
OPEN Cursor_Table;
DECLARE @tableName NVARCHAR(MAX);
FETCH NEXT from Cursor_Table INTO @tableName;
WHILE @@fetch_status = 0
BEGIN
DECLARE @tempSQLText NVARCHAR(MAX) = '';

--3.在表中，用游标columnCursor，遍历所有字段。注意，只遍历字符串类型的字段（列）
DECLARE columnCursor CURSOR FOR
SELECT Name FROM SysColumns WHERE ID = Object_Id( @tableName ) and
(
xtype = 35 or --text
xtype = 99 or --ntext
xtype = 167 or --varchar
xtype = 175 or --char
xtype = 231 or --nvarchar
xtype = 239 or --nchar
xtype = 241 --xml
)
OPEN columnCursor;
DECLARE @columnName NVARCHAR(MAX);
FETCH NEXT from columnCursor INTO @columnName;
WHILE @@fetch_status = 0
BEGIN

--4.在表的字段中，对每一行进行模糊搜索，并输出找到的信息。
DECLARE @DynamicSQLText NVARCHAR(MAX) = 'IF ( EXISTS ( SELECT * FROM [' + @tableName + '] WHERE [' + @columnName + '] LIKE ''%' + @key_find + '%'' ) ) BEGIN DECLARE @CurrentTableCount Bigint = ( SELECT COUNT(*) From [' + @tableName + '] ); PRINT ''Find : Table [' + @tableName + '], Column [' + @columnName + '], Row Count:'' + CAST( @CurrentTableCount AS NVARCHAR(MAX) ) + ''.''; END';
EXEC( @DynamicSQLText );
FETCH NEXT from columnCursor INTO @columnName
END
exec(@tempSQLText);
CLOSE columnCursor;
DEALLOCATE columnCursor;
FETCH NEXT from Cursor_Table INTO @tableName;
END
CLOSE Cursor_Table;
DEALLOCATE Cursor_Table;

END

GO

追问

高手，请解释详细点 另外再说下我运行了建立了对象后怎么用？

追答

EXEC [findStringFromSys] '字符串'