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  1. What is the difference between JOIN and INNER JOIN?

    The fact that when it says INNER JOIN, you can be sure of what it does and that it's supposed to be just that, whereas a plain JOIN will leave you, or someone else, wondering what the …

  2. INNER JOIN vs LEFT JOIN performance in SQL Server

    A LEFT JOIN is absolutely not faster than an INNER JOIN. In fact, it's slower; by definition, an outer join (LEFT JOIN or RIGHT JOIN) has to do all the work of an INNER JOIN plus the extra …

  3. sql - How can I join on a stored procedure? - Stack Overflow

    LEFT JOIN tblRentalUnit u ON t.UnitID = u.ID LEFT JOIN tblProperty p ON u.PropertyID = p.ID LEFT JOIN dbo.fnMyFunc() AS a ON a.TenantID = t.TenantID ORDER BY p.PropertyName, …

  4. sql - Condition within JOIN or WHERE - Stack Overflow

    The question and solutions pertain specifically to INNER JOINs. If the join is a LEFT/RIGHT/FULL OUTER JOIN, then it is not a matter of preference or performance, but one of correct results. …

  5. sql - Left Join With Where Clause - Stack Overflow

    the sentence "Left join returns all values from the right table" is incorrect. Left join returns all values from the LEFT table Protected question. To answer this question, you need to have at …

  6. How to do an INNER JOIN on multiple columns - Stack Overflow

    If airports table is huge, is it better to join it just once on multiple condition. Something like - flights f INNER JOIN airports a ON a.code = f.fairport OR a.code = f.tairport Please suggest.

  7. oracle database - SQL "Join" on null values - Stack Overflow

    1 Do you really want to be able to join the tables if a value is null? Can't you just exclude the possible null values in the join predicate? I find it hard to grok that rows in two tables can be …

  8. What exactly does the .join () method do? - Stack Overflow

    I'm pretty new to Python and am completely confused by .join() which I have read is the preferred method for concatenating strings. I tried: strid = repr(595) print array.array('c', random.sample(

  9. What's the difference between INNER JOIN, LEFT JOIN, RIGHT …

    INNER JOIN gets all records that are common between both tables based on the supplied ON clause. LEFT JOIN gets all records from the LEFT linked and the related record from the right …

  10. What is a SQL JOIN, and what are the different types?

    This JOIN combines LEFT OUTER JOIN and RIGHT OUTER JOIN. It returns rows from either table when the conditions are met and returns NULL value when there is no match. In other …