I need to return true if this query returns value, (and it has values in the db)
SELECT * from AllMembers a
join Cards c on c.IDMember = a.MemberID
where LEN(a.EmployeeNum) = 9
and LEFT(c.CardNumber,3) = '777'
and a.Email is not null
and a.LastUpdate > DATEADD(YEAR, -1 , GETDATE())
and c.CardStatus = 1
and c.AddedTime > DATEADD(YEAR, -1 , GETDATE())
or
LEN(a.EmployeeNum) = 9
and LEFT(c.CardNumber,4) = '2010'
and a.Email is not null
and a.LastUpdate > DATEADD(YEAR, -1 , GETDATE())
and c.CardStatus = 1
and c.AddedTime > DATEADD(YEAR, -1 , GETDATE())
but writing this value return false, why?
string Query= string.Format(@"use Knowledge4All
IF EXISTS (
SELECT ID FROM {0}..AllMembers
JOIN Cards where IDMember = @memberID
and (where LEN(EmployeeNum) = 9
and LEFT(CardNumber,3) = '777'
and Email is not null
and LastUpdate > DATEADD(YEAR, -1 , GETDATE())
and CardStatus = 1
and AddedTime > DATEADD(YEAR, -1 , GETDATE())))
select 1
OR
IF exists(
(LEN(EmployeeNum) = 9
and LEFT(CardNumber,4) = '2010'
and Email is not null
and LastUpdate > DATEADD(YEAR, -1 , GETDATE())
and CardStatus = 1
and AddedTime > DATEADD(YEAR, -1 , GETDATE()) )
SELECT 1", DbName);
Am I writing this wrong? what is the best why to rum this ?
You can write your query like following.
IF EXISTS(SELECT 1 from AllMembers a
join Cards c on c.IDMember = a.MemberID
where LEN(a.EmployeeNum) = 9
and LEFT(c.CardNumber,3) = '777'
and a.Email is not null
and a.LastUpdate > DATEADD(YEAR, -1 , GETDATE())
and c.CardStatus = 1
and c.AddedTime > DATEADD(YEAR, -1 , GETDATE())
or
LEN(a.EmployeeNum) = 9
and LEFT(c.CardNumber,4) = '2010'
and a.Email is not null
and a.LastUpdate > DATEADD(YEAR, -1 , GETDATE())
and c.CardStatus = 1
and c.AddedTime > DATEADD(YEAR, -1 , GETDATE())
)
BEGIN
SELECT 1 as Status
END
ELSE
BEGIN
SELECT 0 AS Status
END
If you are using ExecuteScalar()
, you will get the appropriate value.
Other observation in your query
1- USE statement is not required. It is only required if connection string is set to a different default catalog.
2- You are using string.format
without replacing anything.
but writing this value return false, why?
It may be due to the condition are not matching with any of the record in your table. Run the query directly in SSMS and check the output.
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