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sql server programming
group:retriev employee information with the help of password encryption
sql server programming:
i have a problem that i have encrypted the user password but don't know
how to retrieve information against that user i have written a store procedure but it does not work kindly if any body can help me, then do help me its urgant i have 4 collums in my tbl_login table 1=2E emp_name char 50 pk 2=2E uid char 20 3=2E cat char 10 4 pwd char 20 I have a form for login which takes input from the user. Input fields are 1=2E User ID 2=2E User Password (pwd) 3=2E Category (cat) after taking this information from user I have to check the user validatioin If a user with the same uid, cat and pwd exist then I have to select His/Her Name from table. When I run this store procedure ALTER PROCEDURE dbo.SelectUserLogin ( @id char(20), @pwd char(20), @cat char(10) ) as select * from tbl_login where uid=3D@id and cat=3D@cat if (select pwdcompare(@pwd,pwd,0) from tbl_login) =3D 1 Return Input values for this stored procedure are ahsin,ahsin123,Admin it gives me following result with exception in it. emp_name uid cat pwd -------------------------------------------------- -------------------- ---------- -------------------- Muhammad Ahsin Saleem ahsin Admin Subquery returned more than 1 value. This is not permitted when the subquery follows =3D, !=3D, <, <=3D , >, >=3D or when the subquery= is used as an expression. (1 row(s) returned) @RETURN_VALUE =3D -6=20 Finished running dbo."SelectUserLogin".
In your version of proc below, the problem is in line
if (select pwdcompare(@pwd,pwd,0) from tbl_login) = 1 select pwdcompare(@pwd,pwd,0) from tbl_login returns as many records as in table tbl_login and this is not allowed when subquery is followed by = in this case Original version of this proc you submitted 9/21 looked much better, but as Hugo mentioned - it is hard to help you as you haven't provided info of what actually the problem that you have Mikhail Berlyant Eng.Manager Yahoo! Music [quoted text, click to view] "Muhammad Ahsin Saleem" <ahsin.saleem@gmail.com> wrote in message i have a problem that i have encrypted the user password but don't knownews:1159162759.549285.87330@b28g2000cwb.googlegroups.com... how to retrieve information against that user i have written a store procedure but it does not work kindly if any body can help me, then do help me its urgant i have 4 collums in my tbl_login table 1. emp_name char 50 pk 2. uid char 20 3. cat char 10 4 pwd char 20 I have a form for login which takes input from the user. Input fields are 1. User ID 2. User Password (pwd) 3. Category (cat) after taking this information from user I have to check the user validatioin If a user with the same uid, cat and pwd exist then I have to select His/Her Name from table. When I run this store procedure ALTER PROCEDURE dbo.SelectUserLogin ( @id char(20), @pwd char(20), @cat char(10) ) as select * from tbl_login where uid=@id and cat=@cat if (select pwdcompare(@pwd,pwd,0) from tbl_login) = 1 Return Input values for this stored procedure are ahsin,ahsin123,Admin it gives me following result with exception in it. emp_name uid cat pwd -------------------------------------------------- -------------------- ---------- -------------------- Muhammad Ahsin Saleem ahsin Admin Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression. (1 row(s) returned) @RETURN_VALUE = -6 Finished running dbo."SelectUserLogin".
Hi Muhammad,
Shouldn't you be doing something like this? "select * from tbl_login where uid = @uid and cat= @cat and pwdcompare(@pwd, pwd) = 1" where pwdcompare will be an UDF that compares and returns a boolean value. Also 'the object reference' error is because the dataset instance is not created. you should check if the object instance is created before accessing it's property. Regards, Augustin http://augustinprasanna.blogspot.com [quoted text, click to view] "Muhammad Ahsin Saleem" <ahsin.saleem@gmail.com> wrote in message actual problem is that it gives an exception which isnews:1159170743.874527.141980@m7g2000cwm.googlegroups.com... Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression and when I want to check whether any row is selected or not If ds.Tables("tbl_login").Rows.Count = 0 Then end if it gives an error "object refrence not set to an instance" if you need any more information do tell me very clearly what u want to know about the DB. [quoted text, click to view] Mikhail Berlyant wrote: > In your version of proc below, the problem is in line > if (select pwdcompare(@pwd,pwd,0) from tbl_login) = 1 > > select pwdcompare(@pwd,pwd,0) from tbl_login returns as many records as in > table tbl_login and this is not allowed when subquery is followed by = in > this case > > Original version of this proc you submitted 9/21 looked much better, but > as > Hugo mentioned - it is hard to help you as you haven't provided info of > what > actually the problem that you have > > Mikhail Berlyant > Eng.Manager > Yahoo! Music > > "Muhammad Ahsin Saleem" <ahsin.saleem@gmail.com> wrote in message > news:1159162759.549285.87330@b28g2000cwb.googlegroups.com... > i have a problem that i have encrypted the user password but don't know > > > how to retrieve information against that user i have written a store > procedure but it does not work kindly if any body can help me, then do > help me its urgant > > > i have 4 collums in my tbl_login table > 1. emp_name char 50 pk > 2. uid char 20 > 3. cat char 10 > 4 pwd char 20 > I have a form for login which takes input from the user. Input fields > are > 1. User ID > 2. User Password (pwd) > 3. Category (cat) > after taking this information from user I have to check the user > validatioin If a user with the same uid, cat and pwd exist then I have > to select His/Her Name from table. When I run this store procedure > ALTER PROCEDURE dbo.SelectUserLogin > ( > @id char(20), > @pwd char(20), > @cat char(10) > > > ) > as > select * from tbl_login where uid=@id and cat=@cat > > > if (select pwdcompare(@pwd,pwd,0) from tbl_login) = 1 > Return > > > Input values for this stored procedure are ahsin,ahsin123,Admin > it gives me following result with exception in it. > emp_name uid > cat pwd > -------------------------------------------------- -------------------- > > > > ---------- -------------------- > Muhammad Ahsin Saleem ahsin > Admin Subquery returned more than 1 value. This is not permitted > when the subquery follows =, !=, <, <= , >, >= or when the subquery is > used as an expression. > (1 row(s) returned) > @RETURN_VALUE = -6 > Finished running dbo."SelectUserLogin".
actual problem is that it gives an exception which is
Subquery returned more than 1 value. This is not permitted when the subquery follows =3D, !=3D, <, <=3D , >, >=3D or when the subquer= y is used as an expression and when I want to check whether any row is selected or not If ds.Tables("tbl_login").Rows.Count =3D 0 Then end if it gives an error "object refrence not set to an instance" if you need any more information do tell me very clearly what u want to know about the DB. [quoted text, click to view] Mikhail Berlyant wrote:
> In your version of proc below, the problem is in line > if (select pwdcompare(@pwd,pwd,0) from tbl_login) =3D 1 > > select pwdcompare(@pwd,pwd,0) from tbl_login returns as many records as in > table tbl_login and this is not allowed when subquery is followed by =3D = in > this case > > Original version of this proc you submitted 9/21 looked much better, but = as > Hugo mentioned - it is hard to help you as you haven't provided info of w= hat > actually the problem that you have > > Mikhail Berlyant > Eng.Manager > Yahoo! Music > > "Muhammad Ahsin Saleem" <ahsin.saleem@gmail.com> wrote in message > news:1159162759.549285.87330@b28g2000cwb.googlegroups.com... > i have a problem that i have encrypted the user password but don't know > > > how to retrieve information against that user i have written a store > procedure but it does not work kindly if any body can help me, then do > help me its urgant > > > i have 4 collums in my tbl_login table > 1. emp_name char 50 pk > 2. uid char 20 > 3. cat char 10 > 4 pwd char 20 > I have a form for login which takes input from the user. Input fields > are > 1. User ID > 2. User Password (pwd) > 3. Category (cat) > after taking this information from user I have to check the user > validatioin If a user with the same uid, cat and pwd exist then I have > to select His/Her Name from table. When I run this store procedure > ALTER PROCEDURE dbo.SelectUserLogin > ( > @id char(20), > @pwd char(20), > @cat char(10) > > > ) > as > select * from tbl_login where uid=3D@id and cat=3D@cat > > > if (select pwdcompare(@pwd,pwd,0) from tbl_login) =3D 1 > Return > > > Input values for this stored procedure are ahsin,ahsin123,Admin > it gives me following result with exception in it. > emp_name uid > cat pwd > -------------------------------------------------- -------------------- > > > > ---------- -------------------- > Muhammad Ahsin Saleem ahsin > Admin Subquery returned more than 1 value. This is not permitted > when the subquery follows =3D, !=3D, <, <=3D , >, >=3D or when the subque= ry is > used as an expression. > (1 row(s) returned) > @RETURN_VALUE =3D -6 > Finished running dbo."SelectUserLogin".
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