Skip to content

does equi join return duplicate column

Consider following points: As we know, inner join returns the duplicate column for which we have defined the joining condition. And we know natural join it removes the duplicate. I know we can use …

Multiple joins on the same table multiply counts

When I run multiple joins on the same table, the first join seems to be the only one to go through. For example, I’ll get results like this: ID, NAME, 200, 200 ID, NAME, 150, 150 ID, NAME, 100, 100 …

Mismatches on DateTime between C# and SQL server

I create DateTime in C# like this DateTime oDate = Convert.ToDateTime(xate); that returns 22/09/2020 01:27:00 ب.ظ} and save it in SQL server after saving I see the time that stored is Weird like this …

PSQL Constraint based on column value

Is it possible to have a Constraint but only when one column is set to a particular value. For example take this pseudo-code example of a President which checks to make sure there is never more than 1 …