quote:

---

Originally posted by madhivanan

You need to use not exists

insert into target(co_list)
select col_list from temp as t
where not exists(select * from target where keycol=t.keycol)

Madhivanan

Failing to plan is Planning to fail

---

create procedure sys.sp_special_columns
(
    @table_name         sysname,         -- Wildcard pattern matching IS NOT supported.
    @table_owner        sysname = null,  -- Wildcard pattern matching IS NOT supported.
    @table_qualifier    sysname = null,
    @col_type           char(1) = 'R',
    @scope              char(1) = 'T',   -- Not used in the search criteria.
    @nullable           char(1) = 'U',
    @ODBCVer            int = 2
)
as
    declare @index_id           int
    declare @table_id           int
    -- quotename() returns up to 258 chars
    declare @full_table_name    nvarchar(517) -- 258 + 1 + 258
    declare @scopeout           smallint

    if @col_type not in ('R','V') or @col_type is null
    begin
        raiserror (15251,-1,-1,'col_type','''R'' or ''V''')
        return
    end

    if @scope = 'C'
        select @scopeout = 0
    else if @scope = 'T'
        select @scopeout = 1
    else
    begin
        raiserror (15251,-1,-1,'scope','''C'' or ''T''')
        return
    end

    if @nullable not in ('U','O') or @nullable is null
    begin
        raiserror (15251,-1,-1,'nullable','''U'' or ''O''')
        return
    end

    if @table_qualifier is not null
    begin
        if db_name() <> @table_qualifier
        begin -- If qualifier doesn't match current database
            raiserror (15250, -1,-1)
            return
        end
    end
    if @table_owner is null
    begin    -- If unqualified table name
        select @full_table_name = quotename(@table_name)
    end
    else
    begin   -- Qualified table name
        if @table_owner = ''
        begin   -- If empty owner name
            select @full_table_name = quotename(@table_owner)
        end
        else
        begin
            select @full_table_name = quotename(@table_owner) + '.' + quotename(@table_name)
        end
    end

    --  Get Object ID
    select @table_id = object_id(@full_table_name)

    if (@table_id is null) -- Return empty resultset if table doesn't exist
    begin
        select
            SCOPE           = convert(smallint,0),
            COLUMN_NAME     = convert(sysname,NULL),
            DATA_TYPE       = convert(smallint,0),
            TYPE_NAME       = convert(sysname,NULL),
            "PRECISION"     = convert(int,0),
            "LENGTH"        = convert(int,0),
            SCALE           = convert(smallint,0),
            PSEUDO_COLUMN   = convert(smallint,0)
        where
            1=0
        return
    end

    if @col_type = 'V'
    begin -- if ROWVER, just run that query
        select
            SCOPE           = convert(smallint,NULL),
            COLUMN_NAME     = convert(sysname,c.name),
            DATA_TYPE       = convert(smallint, -2),
            TYPE_NAME       = t.name,
            "PRECISION"     = convert(int,8),
            "LENGTH"        = convert(int,8),
            SCALE           = convert(smallint, NULL),
            PSEUDO_COLUMN   = convert(smallint,1)
        from
            sys.types t,
            sys.all_columns c
        where
            c.object_id = @table_id and
            t.name = 'timestamp' and
            t.user_type_id = c.system_type_id and
            t.user_type_id = c.user_type_id
        return
    end

    -- ROWID, now find the id of the 'best' index for this table

    if @nullable = 'O'  -- Don't include any indexes that contain nullable columns.
        select
            @index_id = MIN(x.index_id)
        from
            sys.indexes x,
            sys.all_columns c,
            sys.all_columns c2
        where
            x.is_unique = 1 and -- If Unique Index
            x.object_id = @table_id and
            x.index_id > 0 and  -- Eliminate Table Row
            c.object_id = x.object_id and
            c2.object_id = c.object_id and
            c.name = index_col(@table_name,x.index_id,c2.column_id)
        group by
            x.index_id HAVING SUM(convert (int, c.is_nullable)) = 0
    else    -- Include indexes that are partially nullable.
        select
            @index_id = MIN(x.index_id)
        from
            sys.indexes x
        where
            x.is_unique = 1 and -- If Unique Index
            x.object_id = @table_id and
            x.index_id > 0      -- Eliminate Table Row

    select
        SCOPE           = @scopeout,
        COLUMN_NAME     = convert(sysname,c.name),
        DATA_TYPE       = convert(smallint,
                                case
                                when (d.ss_dtype = 240) then -- CLR UDT
                                    -4
                                when (d.ss_dtype = 241) then -- XML
                                    -10
                                when (c.max_length = -1 and d.ss_dtype = 167) then -- varchar(max)
                                    -1
                                when (c.max_length = -1 and d.ss_dtype = 231) then -- nvarchar(max)
                                    -10
                                when (c.max_length = -1 and d.ss_dtype = 165) then -- varbinary(max)
                                    -4
                                when d.ss_dtype IN (40,41,42,43) then -- DATE/TIME/DATETIME2/DATETIMEOFFSET
                                     -9  -- SQL_WVARCHAR
                                else
                                    d.DATA_TYPE
                                end),
        TYPE_NAME       = convert(sysname,case
                                when (t.system_type_id = 240 or t.user_type_id > 255) then t.name
                                else d.TYPE_NAME collate database_default
                                  end),
        "PRECISION"     = convert(int,case
                                when d.DATA_TYPE in (6,7) then d.data_precision         -- FLOAT/REAL
                                when (c.max_length = -1 and d.ss_dtype = 240) then -- Large UDT => image for non-SNAC clients
                                    2147483647
                                else OdbcPrec(c.system_type_id,c.max_length,c.precision)
                                end),
        "LENGTH"        = convert(int,case
                                when type_name(d.ss_dtype) IN ('numeric','decimal') then    -- decimal/numeric types
                                  OdbcPrec(c.system_type_id,c.max_length,c.precision)+2
                                when (c.max_length = -1 and d.ss_dtype = 240) then -- Large UDT => image for non-SNAC clients
                                  2147483647
                                when d.ss_dtype IN (40,41,42,43) then 
                                  OdbcPrec(c.system_type_id,c.max_length,c.precision)*2 -- DATE/TIME/DATETIME2/DATETIMEOFFSET
                                else
                                  isnull(d.length, c.max_length)
                                end),
        SCALE           = convert(smallint,case
                                when d.ss_dtype IN (40,41,42,43) then null  -- DATE/TIME/DATETIME2/DATETIMEOFFSET
                                else OdbcScale(c.system_type_id,c.scale)
                                end),
        PSEUDO_COLUMN   = convert(smallint,1)
    from
        sys.columns c inner join
        sys.indexes x on
            (
                x.object_id = c.object_id and
                x.object_id = @table_id and
                x.index_id = @index_id
            ) inner join
        sys.types t on
            (
                t.user_type_id = c.user_type_id
            ) inner join
        sys.spt_datatype_info d on
            (
                d.ss_dtype = c.system_type_id and
                d.ODBCVer = @ODBCVer and
                d.AUTO_INCREMENT = c.is_identity
            ) inner join
        sys.columns c2 on -- Self-join to generate list of index columns and to extract datatype names.
            (
                INDEX_COL(@full_table_name,@index_id,c2.column_id) = c.name and
                c2.object_id = x.object_id
            )

1. Col1
2. Col1 + Col2
3. Col1 + Col2 + Col3
4. Col2
5. Col2 + Col1 -- This is accomodated already by line 2
6. Col2 + Col3
7. Col2 + Col3 + Col1 -- This is accomodated already by line 3
8. Col3
9. Col3 + Col1
A. Col3 + Col1 + Col2 -- This is accomodated already by line 3

CREATE TABLE myTable99(Col1 int, Col2 char, col3 datetime)
GO

DECLARE @TABLE_NAME varchar(256); SET @TABLE_NAME = 'myTable99'
DECLARE @COLUMN_NAME varchar(256), @Cols varchar(MAX), @n int
DECLARE @SQL varchar(MAX), @DATA_TYPE varchar(255), @ORDINAL_POSITION int
DECLARE @Offset int
DECLARE @t table (TABLE_NAME varchar(256), COLUMN_NAME varchar(256), UNIQUE_VALS CHAR(1))
DECLARE @MAX_ORDINAL_POSITION int
SELECT @MAX_ORDINAL_POSITION = MAX(ORDINAL_POSITION) 
								 FROM INFORMATION_SCHEMA.COLUMNS
								WHERE TABLE_NAME = @TABLE_NAME
								
DECLARE myCursor99 CURSOR
FOR 
SELECT COLUMN_NAME, DATA_TYPE, ORDINAL_POSITION
  FROM INFORMATION_SCHEMA.COLUMNS
 WHERE TABLE_NAME = @TABLE_NAME
 
 OPEN myCursor99
 
FETCH NEXT FROM myCursor99 INTO @COLUMN_NAME, @DATA_TYPE, @ORDINAL_POSITION
SELECT @Cols = @COLUMN_NAME, @n = 1

WHILE @@FETCH_STATUS = 0
  BEGIN
--	PRINT @Cols
	WHILE @n < @MAX_ORDINAL_POSITION + 2
	  BEGIN
		IF @n <> @ORDINAL_POSITION
		  BEGIN
			PRINT @Cols
			SELECT @COLUMN_NAME = COLUMN_NAME FROM  INFORMATION_SCHEMA.COLUMNS
			 WHERE ORDINAL_POSITION = @n
			SET @Cols = @Cols + '+' + @COLUMN_NAME
		  END
		SELECT @n = @n + 1
	  END
	FETCH NEXT FROM myCursor99 INTO @COLUMN_NAME, @DATA_TYPE, @ORDINAL_POSITION
	SELECT @Cols = @COLUMN_NAME, @n = 1 
  END

CLOSE myCursor99
DEALLOCATE myCursor99
GO

DROP TABLE myTable99
GO

SET NOCOUNT ON
GO

CREATE TABLE myTable99(Col1 int, Col2 char, col3 datetime)
GO

INSERT INTO myTable99(Col1, Col2, Col3)
SELECT 1, 'A', '1960-10-24' UNION ALL
SELECT 2, 'B', '1960-10-24' UNION ALL
SELECT 2, 'C', '2010-10-24'
GO

CREATE TABLE ##t (TABLE_NAME varchar(256), Cols varchar(MAX), UNIQUE_VALS CHAR(1), Cols_Hash int)
GO

DECLARE @TABLE_NAME varchar(256); SET @TABLE_NAME = 'myTable99'
DECLARE @COLUMN_NAME varchar(256), @Cols varchar(MAX), @Cols_D varchar(MAX), @n int
DECLARE @SQL varchar(MAX), @DATA_TYPE varchar(255), @ORDINAL_POSITION int
DECLARE @Offset int, @Col_Hash int
DECLARE @MAX_ORDINAL_POSITION int
SELECT @MAX_ORDINAL_POSITION = MAX(ORDINAL_POSITION) 
								 FROM INFORMATION_SCHEMA.COLUMNS
								WHERE TABLE_NAME = @TABLE_NAME
								
DECLARE myCursor99 CURSOR
FOR 
SELECT COLUMN_NAME, DATA_TYPE, ORDINAL_POSITION
  FROM INFORMATION_SCHEMA.COLUMNS
 WHERE TABLE_NAME = @TABLE_NAME
 
 OPEN myCursor99
 
FETCH NEXT FROM myCursor99 INTO @COLUMN_NAME, @DATA_TYPE, @ORDINAL_POSITION
SELECT @Cols = CASE WHEN @DATA_TYPE NOT IN ('cha','nchar','varchar','nvarchar') 
					THEN 'CONVERT(varchar(26),' + @COLUMN_NAME + ')'
					ELSE @COLUMN_NAME
			   END
    , @Cols_D = @COLUMN_NAME
	, @n = 1, @Col_Hash  = POWER(2,@ORDINAL_POSITION)

WHILE @@FETCH_STATUS = 0
  BEGIN
--	PRINT @Cols
	WHILE @n < @MAX_ORDINAL_POSITION + 2
	  BEGIN
		IF @n <> @ORDINAL_POSITION
		  BEGIN
			INSERT INTO ##t(TABLE_NAME,Cols, Cols_Hash)
			SELECT @TABLE_NAME, @Cols_D, @Col_Hash
			 WHERE @Col_Hash NOT IN (SELECT Cols_Hash FROM ##t)
--			PRINT @Cols + ' ' + CONVERT(varchar(26),POWER(2,@n))
			SET @SQL = 'IF EXISTS (SELECT COUNT(*) FROM ' + @TABLE_NAME + ' GROUP BY ' + @Cols + ' HAVING COUNT(*) <> 1)'
						+ ' UPDATE ##t SET UNIQUE_VALS = ''N'''
						+ ' WHERE TABLE_NAME = ' + '''' + @TABLE_NAME + ''''
						+ ' AND Cols = ' + '''' + @Cols_D + ''''
--			PRINT 'SELECT COUNT(*) FROM ' + @TABLE_NAME + ' GROUP BY ' + @Cols + ' HAVING COUNT(*) <> 1'
			PRINT @SQL
			EXEC(@SQL)
			SELECT @COLUMN_NAME = COLUMN_NAME, @DATA_TYPE = DATA_TYPE
			  FROM  INFORMATION_SCHEMA.COLUMNS
			 WHERE ORDINAL_POSITION = @n
			SET @Cols = @Cols + '+' + CASE  WHEN @DATA_TYPE NOT IN ('char','nchar','varchar','nvarchar') 
											THEN 'CONVERT(varchar(26),' + @COLUMN_NAME + ')'
											ELSE @COLUMN_NAME
									   END
			SET @Cols_D = @Cols_D + '+' + @COLUMN_NAME
		    SET @Col_Hash = @Col_Hash + POWER(2,@n)
		  END
		SELECT @n = @n + 1
	  END
	FETCH NEXT FROM myCursor99 INTO @COLUMN_NAME, @DATA_TYPE, @ORDINAL_POSITION
	SELECT @Cols = CASE WHEN @DATA_TYPE NOT IN ('char','nchar','varchar','nvarchar') 
					THEN 'CONVERT(varchar(26),' + @COLUMN_NAME + ')'
					ELSE @COLUMN_NAME
			   END
    , @Cols_D = @COLUMN_NAME
	, @n = 1, @Col_Hash  = POWER(2,@ORDINAL_POSITION)
  END

CLOSE myCursor99
DEALLOCATE myCursor99
GO

UPDATE ##t SET UNIQUE_VALS = 'Y' WHERE UNIQUE_VALS IS NULL
GO

SELECT * FROM ##t
GO

  SELECT *
    FROM ##t o
   WHERE UNIQUE_VALS = 'Y'
	 AND Cols_Hash = (SELECT MIN(Cols_Hash) FROM ##t i 
					   WHERE UNIQUE_VALS = 'Y'
					     AND i.TABLE_NAME = o.TABLE_NAME)  
GO

DROP TABLE myTable99, ##t