Agunahwan's Blog

/*********************************************************
Author      : Agunahwan Absin
Create Date : 24/06/2020
Description : Stored Procedure for get column in table by value of row
Example     : EXEC dbo.sp_SearchColumnByValue 'Akademik','Agun'
**********************************************************/
CREATE PROCEDURE dbo.sp_SearchColumnByValue @DatabaseName VARCHAR(128) = ''
    ,@Value VARCHAR(MAX) = ''
    ,@TableName VARCHAR(128) = NULL
    ,@TableSchemaName VARCHAR(128) = 'dbo'<br />
AS
BEGIN
    DECLARE @CountTable INT = 1
        ,@IncTable INT = 1
        ,@Query VARCHAR(MAX) = ''

<pre><code>-- Validation if @DatabaseName is empty
IF (@DatabaseName = '')
BEGIN
    RAISERROR (
            15600
            ,- 1
            ,- 1
            ,'Database name must be filled'
            );
END

-- Preventive steps for handling error if ##TempResult is exists
IF OBJECT_ID('tempdb..##TempResult') IS NOT NULL
BEGIN
    DROP TABLE ##TempResult
END

-- Create table ##TempResult with empty data
SET @Query = 'SELECT t.TABLE_NAME
            ,COLUMN_NAME
            ,CONVERT(INT, 1) AS TOTAL_DATA
        INTO ##TempResult
        FROM ' + @DatabaseName + '.INFORMATION_SCHEMA.TABLES t
        JOIN ' + @DatabaseName + '.INFORMATION_SCHEMA.COLUMNS c ON t.TABLE_NAME = c.TABLE_NAME
        WHERE 1 = 2'

EXEC (@Query)

-- Preventive steps for handling error if ##TempTables is exists
IF OBJECT_ID('tempdb..##TempTables') IS NOT NULL
BEGIN
    DROP TABLE ##TempTables
END

-- Create table ##TempTables with empty data
SET @Query = 'SELECT IDENTITY(INT, 1, 1) AS ID
            ,TABLE_NAME
        INTO ##TempTables
        FROM ' + @DatabaseName + '.INFORMATION_SCHEMA.TABLES
        WHERE TABLE_TYPE = ''BASE TABLE''
            AND TABLE_NAME <> ''sysdiagrams''
            AND TABLE_SCHEMA = ''' + @TableSchemaName + ''''

IF (@TableName IS NOT NULL)
BEGIN
    SET @Query = @Query + ' AND TABLE_NAME = ''' + @TableName + ''''
END

EXEC (@Query)

-- Set delimiter loop
SELECT @IncTable = 1
    ,@CountTable = Count(1)
FROM ##TempTables

-- Looping for executing all tables to search table name
WHILE (@IncTable <= @CountTable)
BEGIN
    DECLARE @CountColumn INT
        ,@IncColumn INT

    -- Get table name for searching in this table & for retrieving all columns in that table
    SELECT @TableName = TABLE_NAME
    FROM ##TempTables
    WHERE ID = @IncTable

    -- Preventive steps for handling error if ##TempColumns is exists
    IF OBJECT_ID('tempdb..##TempColumns') IS NOT NULL
    BEGIN
        DROP TABLE ##TempColumns
    END

    -- Generate query for getting all columns in the table
    SET @Query = 'SELECT IDENTITY(INT, 1, 1) AS ID
                ,c.name AS COLUMN_NAME
                ,type_name(c.user_type_id) AS DATA_TYPE
            INTO ##TempColumns
            FROM ' + @DatabaseName + '.INFORMATION_SCHEMA.TABLES it
            JOIN ' + @DatabaseName + '.sys.tables t ON it.TABLE_NAME = t.NAME
            JOIN ' + @DatabaseName + '.sys.columns c ON t.object_id = c.object_id
            WHERE it.TABLE_SCHEMA = ''' + @TableSchemaName + ''' 
                AND type_name(c.user_type_id) <> ''TEXT'' 
                AND it.TABLE_NAME = ''' + @TableName + '''
                AND c.max_length >= ' + CONVERT(VARCHAR, LEN(@Value))

    EXEC (@Query)

    -- Set delimiter loop
    SELECT @IncColumn = 1
        ,@CountColumn = Count(1)
    FROM ##TempColumns

    -- Looping for executing all columns to search column name
    WHILE (@IncColumn <= @CountColumn)
    BEGIN
        DECLARE @ColumnName VARCHAR(128)
            ,@DataType VARCHAR(8000)

        -- Get column name & the data type for searching in the column
        SELECT @ColumnName = COLUMN_NAME
            ,@DataType = DATA_TYPE
        FROM ##TempColumns
        WHERE ID = @IncColumn

        -- Generate query for checking if the value exists in that table & column
        SET @Query = 'INSERT INTO ##TempResult (TABLE_NAME, COLUMN_NAME, TOTAL_DATA) 
                SELECT ''' + @TableName + ''' AS TABLE_NAME
                    ,''' + @ColumnName + ''' AS COLUMN_NAME
                    ,COUNT(1) AS TOTAL_DATA
                FROM ' + @DatabaseName + '.' + @TableSchemaName + '.' + @TableName

        -- If the data type is varchar, nvarchar, xml, or nchar then use try_cast for comparing value
        IF (
                @DataType IN (
                    'VARCHAR'
                    ,'NVARCHAR'
                    ,'XML'
                    ,'NCHAR'
                    ,'CHAR'
                    ,'TEXT'
                    )
                )
        BEGIN
            SET @Query = @Query + ' WHERE ' + @ColumnName + ' = TRY_CAST(''' + @Value + ''' AS ' + @DataType + ') '
        END
        ELSE IF (@DataType IN ('UNIQUEIDENTIFIER')) -- If the data type is UNIQUEIDENTIFIER then use try_convert for comparing value
        BEGIN
            SET @Query = @Query + ' WHERE ' + @ColumnName + ' = TRY_CONVERT(' + @DataType + ',''' + @Value + ''') '
        END
        ELSE -- and use try_parse for else
        BEGIN
            SET @Query = @Query + ' WHERE ' + @ColumnName + ' = TRY_PARSE(''' + @Value + ''' AS ' + @DataType + ') '
        END

        SET @Query = @Query + 'GROUP BY ' + @ColumnName

        EXEC (@Query)

        SET @IncColumn = @IncColumn + 1
    END

    DROP TABLE ##TempColumns

    SET @IncTable = @IncTable + 1
END

-- Show all data that have the value
SELECT *
FROM ##TempResult
WHERE TOTAL_DATA > 0

DROP TABLE ##TempTables

DROP TABLE ##TempResult
</code></pre>
<p>END<br />
GO