How to find out the tables and columns that hold the particular data
In some of the scenario a developer have to check is there any particular value is stored in the any of the table in the entire db. It is very hard to find out the column and table that holds the particular data, by calling select query for each and every table in the database.
Following store procedure will search the particular data that we are given as the paramaeter to stored procedure, in the all tables and coloumns in the entire db and return the results. If we want to perfect match of the search key given the second parameter as 1 else 0.
StoredProcedure for search a keyword in the entire database.
CREATE PROCEDURE FindMyData_String
@DataToFind NVARCHAR(4000),
@ExactMatch BIT = 0
AS
SET NOCOUNT ON
DECLARE @Temp TABLE(RowId INT IDENTITY(1,1),
SchemaName sysname,
TableName sysname,
ColumnName SysName,
DataType VARCHAR(100), DataFound BIT)
INSERT INTO @Temp(TableName,SchemaName, ColumnName, DataType)
SELECT C.Table_Name,C.TABLE_SCHEMA, C.Column_Name, C.Data_Type
FROM Information_Schema.Columns AS C
INNER Join Information_Schema.Tables AS T
ON C.Table_Name = T.Table_Name
AND C.TABLE_SCHEMA = T.TABLE_SCHEMA
WHERE Table_Type = 'Base Table'
And Data_Type In
('ntext','text','nvarchar','nchar','varchar','char')
DECLARE @i INT
DECLARE @MAX INT
DECLARE @TableName sysname
DECLARE @ColumnName sysname
DECLARE @SchemaName sysname
DECLARE @SQL NVARCHAR(4000)
DECLARE @PARAMETERS NVARCHAR(4000)
DECLARE @DataExists BIT
DECLARE @SQLTemplate NVARCHAR(4000)
SELECT @SQLTemplate = CASE WHEN @ExactMatch = 1
THEN 'If Exists(Select *
From ReplaceTableName
Where Convert(nVarChar(4000), [ReplaceColumnName])
= ''' + @DataToFind + '''
)
Set @DataExists = 1
Else
Set @DataExists = 0'
ELSE 'If Exists(Select *
From ReplaceTableName
Where Convert(nVarChar(4000), [ReplaceColumnName])
Like ''%' + @DataToFind + '%''
)
Set @DataExists = 1
Else
Set @DataExists = 0'
END,
@PARAMETERS = '@DataExists Bit OUTPUT',
@i = 1
SELECT @i = 1, @MAX = MAX(RowId)
FROM @Temp
WHILE @i <= @MAX
BEGIN
SELECT @SQL = REPLACE(REPLACE(@SQLTemplate, 'ReplaceTableName',
QUOTENAME(SchemaName) + '.' + QUOTENAME(TableName)),
'ReplaceColumnName', ColumnName)
FROM @Temp
WHERE RowId = @i
PRINT @SQL
EXEC SP_EXECUTESQL @SQL, @PARAMETERS, @DataExists = @DataExists OUTPUT
IF @DataExists =1
UPDATE @Temp SET DataFound = 1 WHERE RowId = @i
SET @i = @i + 1
END
SELECT SchemaName,TableName, ColumnName
FROM @Temp
WHERE DataFound = 1
GO
