有没有办法在SQL Server数据库的所有表中搜索字符串?
我想搜索字符串，比如john。结果应该显示包含john的表和它们各自的行。
当前回答
不需要嵌套循环(遍历表的外部循环和遍历所有表列的内部循环)。可以从INFORMATION_SCHEMA中检索所有(或任意选择/筛选的)表-列组合。COLUMNS和在一个循环中简单地遍历(搜索)所有它们:
DECLARE @search VARCHAR(100), @table SYSNAME, @column SYSNAME
DECLARE curTabCol CURSOR FOR
SELECT c.TABLE_SCHEMA + '.' + c.TABLE_NAME, c.COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS c
JOIN INFORMATION_SCHEMA.TABLES t
ON t.TABLE_NAME=c.TABLE_NAME AND t.TABLE_TYPE='BASE TABLE' -- avoid views
WHERE c.DATA_TYPE IN ('varchar','nvarchar') -- searching only in these column types
--AND c.COLUMN_NAME IN ('NAME','DESCRIPTION') -- searching only in these column names
SET @search='john'
OPEN curTabCol
FETCH NEXT FROM curTabCol INTO @table, @column
WHILE (@@FETCH_STATUS = 0)
BEGIN
EXECUTE('IF EXISTS
(SELECT * FROM ' + @table + ' WHERE ' + @column + ' = ''' + @search + ''')
PRINT ''' + @table + '.' + @column + '''')
FETCH NEXT FROM curTabCol INTO @table, @column
END
CLOSE curTabCol
DEALLOCATE curTabCol
其他回答
这很有帮助。我想把这个函数导入到Postgre SQL数据库。我想把它分享给感兴趣的人。会有几个小时。注意:这个函数创建了一个SQL语句列表，可以在Postgre数据库上复制和执行。也许比我聪明的人可以让Postgre在一个函数中创建并执行所有语句。
CREATE OR REPLACE FUNCTION SearchAllTables(_search text) RETURNS TABLE( txt text ) as $funct$
DECLARE __COUNT int;
__SQL text;
BEGIN
EXECUTE 'SELECT COUNT(0) FROM INFORMATION_SCHEMA.COLUMNS
WHERE DATA_TYPE = ''text''
AND table_schema = ''public'' ' INTO __COUNT;
RETURN QUERY
SELECT CASE WHEN ROW_NUMBER() OVER (ORDER BY table_name) < __COUNT THEN
'SELECT ''' || table_name ||'.'|| column_name || ''' AS tbl, "' || column_name || '" AS col FROM "public"."' || "table_name" || '" WHERE "'|| "column_name" || '" ILIKE ''%' || _search || '%'' UNION ALL'
ELSE
'SELECT ''' || table_name ||'.'|| column_name || ''' AS tbl, "' || column_name || '" AS col FROM "public"."' || "table_name" || '" WHERE "'|| "column_name" || '" ILIKE ''%' || _search || '%'''
END AS txt
FROM INFORMATION_SCHEMA.COLUMNS
WHERE DATA_TYPE = 'text'
AND table_schema = 'public';
END
$funct$ LANGUAGE plpgsql;
[CREATE PROC SearchAllTables ( @SearchStr nvarchar(100) ) AS
BEGIN
CREATE TABLE #Results (ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256),
@ColumnName nvarchar(128),
@SearchStr2 nvarchar(110)
SET @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
WHILE @TableName IS NOT NULL
BEGIN
SET @ColumnName = ''
SET @TableName = ( SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
AND QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
AND OBJECTPROPERTY( OBJECT_ID( QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) ), 'IsMSShipped' ) = 0
)
WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
BEGIN
SET @ColumnName = ( SELECT MIN(QUOTENAME(COLUMN_NAME))
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(@TableName, 2)
AND TABLE_NAME = PARSENAME(@TableName, 1)
AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar')
AND QUOTENAME(COLUMN_NAME) > @ColumnName )
IF @ColumnName IS NOT NULL
BEGIN
INSERT INTO #Results
EXEC ( 'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630) FROM ' + @TableName + ' (NOLOCK) ' + ' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2 )
END
END
END
SELECT ColumnName, ColumnValue FROM #Results
END
EXEC SearchAllTables 'Computer'][1]
[1]: https://koukia.ca/search-for-a-string-in-all-tables-and-all-fields-of-a-database-with-tsql-b6f8a1bfda37
更新TechDo对SQL server 2012的答案。你需要更改:'FROM ' + @TableName + ' (NOLOCK)+ @TableName + 'WITH (NOLOCK)' +
在这个版本的SQL Server中不支持已弃用的功能“不带WITH的表提示”。
下面是更新后的完整存储过程:
CREATE PROC SearchAllTables
(
@SearchStr nvarchar(100)
)
AS
BEGIN
CREATE TABLE #Results (ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
WHILE @TableName IS NOT NULL
BEGIN
SET @ColumnName = ''
SET @TableName =
(
SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
AND QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
AND OBJECTPROPERTY(
OBJECT_ID(
QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)
), 'IsMSShipped'
) = 0
)
WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
BEGIN
SET @ColumnName =
(
SELECT MIN(QUOTENAME(COLUMN_NAME))
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(@TableName, 2)
AND TABLE_NAME = PARSENAME(@TableName, 1)
AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar', 'int', 'decimal')
AND QUOTENAME(COLUMN_NAME) > @ColumnName
)
IF @ColumnName IS NOT NULL
BEGIN
INSERT INTO #Results
EXEC
(
'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630)
FROM ' + @TableName + 'WITH (NOLOCK) ' +
' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2
)
END
END
END
SELECT ColumnName, ColumnValue FROM #Results
END
改进来自@Brandon的惊人答案，我使用类型转换向ntext和xml添加了类型:
BEGIN TRAN
DECLARE @SearchStr nvarchar(100) = 'SEARCH_TEXT'
DECLARE @Results TABLE (ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
WHILE @TableName IS NOT NULL
BEGIN
SET @ColumnName = ''
SET @TableName =
(
SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
AND QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
AND OBJECTPROPERTY(
OBJECT_ID(
QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)
), 'IsMSShipped'
) = 0
)
WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
BEGIN
SET @ColumnName =
(
SELECT MIN(QUOTENAME(COLUMN_NAME))
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(@TableName, 2)
AND TABLE_NAME = PARSENAME(@TableName, 1)
AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar', 'int', 'decimal', 'ntext', 'xml')
AND QUOTENAME(COLUMN_NAME) > @ColumnName
)
IF @ColumnName IS NOT NULL
BEGIN
INSERT INTO @Results
EXEC
(
'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT((cast(' + @ColumnName + ' as nvarchar(max))), 3630)
FROM ' + @TableName + ' (NOLOCK) ' +
' WHERE (cast(' + @ColumnName + ' as nvarchar(max))) LIKE ' + @SearchStr2
)
END
END
END
SELECT ColumnName, ColumnValue FROM @Results
ROLLBACK
我已经为这个写了一个SP，它以表名的形式返回搜索结果，在其中找到搜索关键字字符串的列名以及搜索对应的行，如下面的屏幕截图所示。
这可能不是最有效的解决方案，但您可以根据需要随时修改和使用它。
IF OBJECT_ID('sp_KeywordSearch', 'P') IS NOT NULL
DROP PROC sp_KeywordSearch
GO
CREATE PROCEDURE sp_KeywordSearch @KeyWord NVARCHAR(100)
AS
BEGIN
DECLARE @Result TABLE
(TableName NVARCHAR(300),
ColumnName NVARCHAR(MAX))
DECLARE @Sql NVARCHAR(MAX),
@TableName NVARCHAR(300),
@ColumnName NVARCHAR(300),
@Count INT
DECLARE @tableCursor CURSOR
SET @tableCursor = CURSOR LOCAL SCROLL FOR
SELECT N'SELECT @Count = COUNT(1) FROM [dbo].[' + T.TABLE_NAME + '] WITH (NOLOCK) WHERE CAST([' + C.COLUMN_NAME +
'] AS NVARCHAR(MAX)) LIKE ''%' + @KeyWord + N'%''',
T.TABLE_NAME,
C.COLUMN_NAME
FROM INFORMATION_SCHEMA.TABLES AS T WITH (NOLOCK)
INNER JOIN INFORMATION_SCHEMA.COLUMNS AS C WITH (NOLOCK)
ON T.TABLE_SCHEMA = C.TABLE_SCHEMA AND
T.TABLE_NAME = C.TABLE_NAME
WHERE T.TABLE_TYPE = 'BASE TABLE' AND
C.TABLE_SCHEMA = 'dbo' AND
C.DATA_TYPE NOT IN ('image', 'timestamp')
OPEN @tableCursor
FETCH NEXT FROM @tableCursor INTO @Sql, @TableName, @ColumnName
WHILE (@@FETCH_STATUS = 0)
BEGIN
SET @Count = 0
EXEC sys.sp_executesql
@Sql,
N'@Count INT OUTPUT',
@Count OUTPUT
IF @Count > 0
BEGIN
INSERT INTO @Result
(TableName, ColumnName)
VALUES (@TableName, @ColumnName)
END
FETCH NEXT FROM @tableCursor INTO @Sql, @TableName, @ColumnName
END
CLOSE @tableCursor
DEALLOCATE @tableCursor
SET @tableCursor = CURSOR LOCAL SCROLL FOR
SELECT SUBSTRING(TB.Sql, 1, LEN(TB.Sql) - 3) AS Sql, TB.TableName, SUBSTRING(TB.Columns, 1, LEN(TB.Columns) - 1) AS Columns
FROM (SELECT R.TableName, (SELECT R2.ColumnName + ', ' FROM @Result AS R2 WHERE R.TableName = R2.TableName FOR XML PATH('')) AS Columns,
'SELECT * FROM ' + R.TableName + ' WITH (NOLOCK) WHERE ' +
(SELECT 'CAST(' + R2.ColumnName + ' AS NVARCHAR(MAX)) LIKE ''%' + @KeyWord + '%'' OR '
FROM @Result AS R2
WHERE R.TableName = R2.TableName
FOR
XML PATH('')) AS Sql
FROM @Result AS R
GROUP BY R.TableName) TB
ORDER BY TB.Sql
OPEN @tableCursor
FETCH NEXT FROM @tableCursor INTO @Sql, @TableName, @ColumnName
WHILE (@@FETCH_STATUS = 0)
BEGIN
PRINT @Sql
SELECT @TableName AS [Table],
@ColumnName AS Columns
EXEC(@Sql)
FETCH NEXT FROM @tableCursor INTO @Sql, @TableName, @ColumnName
END
CLOSE @tableCursor
DEALLOCATE @tableCursor
END
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