. Richelle Mead is the author of the internationally bestselling Vampire Academy series,. The Immortal Crown is the second novel in the series following Gameboard of the Gods. Fans of Chloe Neill and Jim Butcher should look this way.
Gameboard of the Gods.epub. Richelle Mead is the author of the internationally bestselling Vampire Academy series, The Immortal Crown is the second novel in the series following Gameboard of the Gods. Fans of Chloe Neill and Jim Butcher should look this way.
. Richelle Mead is the author of the internationally bestselling Vampire Academy series,.
richelle mead gameboard of the gods epub. Book: Gameboard of the Gods (2013), Series: Age of X in PDF,EPUB.Q:
Conditional SQL Left Join
I have 2 tables (dataframes) where one has many more records than the other.
I'm using the following query to pull data from Table A where the ID matches Table B's ID.
SELECT *
FROM TableA A
LEFT JOIN TableB B ON A.ID = B.ID
WHERE B.ID IS NOT NULL
This returns some records from Table A.
Table B has several columns. One of which is CompanyName (fk-CompanyName)
I need to return only records from Table A if the CompanyName from Table B matches the CompanyName in the same row from Table A.
I tried a conditional Join but it doesnt appear to be working as expected.
The reason for the need for this is that Table A needs to be displayed in sorted order but Table B should always be displayed first.
A:
You can use a subquery:
SELECT *
FROM TableA A
JOIN (SELECT b.id, b.CompanyName
FROM TableB b
WHERE b.ID IS NOT NULL
) B USING (id)
WHERE B.CompanyName IS NOT NULL;
A:
Or, if you just want records from A, regardless of the ones in B:
SELECT *
FROM TableA A
LEFT JOIN TableB B ON A.ID = B.ID
WHERE B.ID IS NOT NULL AND A.CompanyName = B.CompanyName
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