Validating all the columns in a record

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Validating all the columns in a record

dasari_stupid-735994

Valued Member

Points: 51
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January 15, 2009 at 12:02 pm

#204142

Hi,
Please find our requirement below,
We have a staging table with the following structure
Tgt_stg:
---------
col1 varchar(100),
col2 varchar(100),
col3 varchar(100)
We have target table with the following desc
Tgt_tab:
---------
col1 Numeric(10),
col2 datetime,
col3 varchar(20)
We have a requirement to validate the values in stage table for all the records against the target table(i.e)
isnumeric(Row1.col1),isdate(Row1.col2),len (Row1.col3)<=20
isnumeric(Row2.col1),isdate(Row2.col2),len (Row2.col3)<=20
isnumeric(Row3.col1),isdate(Row3.col2),len (Row3.col3)<=20
isnumeric(Row4.col1),isdate(Row4.col2),len (Row4.col3)<=20
.
.
.
.
The records that failed to confirm the validation should redirected to a error table by concatenating all the error messages.
We are planning to write a SP for the same.As we are new SQL server,It could be helpful if you give the complete code.
Thanks.

Viewing 4 posts - 1 through 3 (of 3 total)

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Lowell SSC Guru Points: 323504 More actions · Answer 1

wouldn't you simply identify the offending rows like this?

SELECT *

FROM YOUR STAGINGTABLE

WHERE isnumeric(col1) = 0

OR isdate(col2) = 0

OR len (Row1.col3)> 20

Lowell

--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

muthukrishnan_1985 Grasshopper Points: 21 More actions · Answer 2

Hi,

Thanks for reply.

The problem here we need to pass the table name dynamically.It means that the procedure should able to validate all the columns what ever the table we are passing.

For this purpose we are using 'INFORMATION_SCHEMA.COLUMNS' to get the metadata details for a table.We stuck up there.

We need a procedure for which the stage,target table names should be an argument.

Hope i cleared the requirement.

Thanks in advance.

Regards,

Muthu...

Lowell SSC Guru Points: 323504 More actions · Answer 3

ok this nippet, based on using some FOR XML statements goves a SQL statement you could execute that looks like this:

SELECT * FROM MYSTAGE WHERE 1 = 2

OR ISNUMERIC(COUNTYTBLKEY) = 0

OR ISNUMERIC(INDEXTBLKEY) = 0

OR LEN(STATE) > 2

OR LEN(DESCRIP) > 30

OR LEN(CODE) > 3

OR ISNUMERIC(STATETBLKEY) = 0

OR ISNUMERIC(REGIONTBLKEY) = 0

OR ISNUMERIC(EDREGIONTBLKEY) = 0

OR ISNUMERIC(SPECDISTTBLKEY) = 0

this might get you started:

[font="Courier New"]DECLARE @STAGINGTABLE VARCHAR(125),

@TESTAGAINST VARCHAR(125)

SELECT @STAGINGTABLE ='MYSTAGE' ,

@TESTAGAINST ='TBCOUNTY'

SELECT

DISTINCT REPLACE(REPLACE('SELECT * FROM '

+ @STAGINGTABLE

+ ' WHERE 1 = 2 '

+ STUFF(

(

SELECT

' OR '

+ CASE

WHEN B.DATA_TYPE IN('varchar','nvarchar','char','nchar')

THEN ' LEN('+ B.COLUMN_NAME + ') > '+ CONVERT(VARCHAR,CHARACTER_MAXIMUM_LENGTH) + ' '

WHEN DATA_TYPE IN('datetime')

THEN ' ISDATE(' + B.COLUMN_NAME + ') = 0 '

WHEN DATA_TYPE IN('int','bigint','money','float','decimal','numeric')

THEN ' ISNUMERIC('+ B.COLUMN_NAME + ') = 0 '

END

FROM information_schema.columns B

WHERE A.TABLE_NAME = B.TABLE_NAME

FOR XML PATH(''))

,

1, 2, ' OR ') ,'>','>'

),'OR R ',' OR ') AS SQLSTATEMENT

FROM information_schema.columns A

WHERE TABLE_NAME = @TESTAGAINST

[/font]

Lowell

--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!