IF ELSE Statement in SQL

SELECT S.Id, S.Name, S.Version, S.SoftNo
FROM SOFTWARE S WITH(NOLOCK)
WHERE (IF S.Version = 0 THEN S.Version > 0 ELSE S.Version = @Version)
AND (IF S.SoftNo = 0 THEN S.SoftNo > 0 ELSE S.SoftNo = @SoftNo)

If Version is equal to zero, I want to list everything version number is greater then 0 if it is not equal to 0, then Version should be whatever it is value.

This is same for SoftNo.

How can I fix my SQL query. It just doesn't work.

More details:

This is what I want to achieve:

if(Version == 0)
{
     display every single rows if their version number is greater then 0;
}
else
{
     Lets assume that Version is equal to 5. Then just display the rows if their Version number is equal to 5;
} // This is like a C# code of what I am trying to do in my sql query.

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您必须使用CASE WHEN语句而不是if

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尝试这样的事情：

SELECT S.Id, S.Name, S.Version, S.SoftNo
FROM SOFTWARE S WITH(NOLOCK)
WHERE ((@Version = 0 AND S.Version > 0) OR 
       (@Version <> 0 AND S.Version = @Version)) AND 
      ((@SoftNo = 0 AND S.SoftNo > 0) OR 
       (@SoftNo <> 0 AND S.SoftNo = @SoftNo))

---

你有没有想过使用SQL案例？

SELECT col1, col2,
    CASE
        WHEN expression THEN return 
        WHEN expression THEN return 
        ELSE return 
    END AS NameOfNewColWithReturnValues
FROM Col_FROM_WHICH_TABLE 

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