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(
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 …
LEFT JOIN vs. LEFT OUTER JOIN in SQL Server - Stack Overflow
Jan 2, 2009 · Left Join and Left Outer Join are one and the same. The former is the shorthand for the latter. The same can be said about the Right Join and Right Outer Join relationship. The …
What is difference between INNER join and OUTER join
1 Inner join matches tables on keys, but outer join matches keys just for one side. For example when you use left outer join the query brings the whole left side table and matches the right …
python - How does os.path.join () work? - Stack Overflow
Dec 17, 2013 · Your second join call is not os.path.join, it is str.join. What this one does is that it joins the argument (as an iterable, meaning it can be seen as f, i, s, h) with self as the …
SQL JOIN: what is the difference between WHERE clause and ON …
If you are doing a LEFT JOIN, add any WHERE conditions to the ON clause for the table in the right side of the join. This is a must, because adding a WHERE clause that references the right …
sql - How to do join on multiple criteria, returning all combinations ...
May 28, 2014 · I am willing to bet that this is a really simple answer as I am a noob to SQL. Given: table1 has column 1 (criteria 1) column 2 (criteria 2) column 3 (metric 1) table2 has column 1 …
Delete with "Join" in Oracle sql Query - Stack Overflow
Oct 21, 2015 · For a delete query requirig a join, this example will delete rows that are unmatched in the joined table "docx_document" and that have a create date > 120 days in the …
What is the difference between JOIN and UNION? - Stack Overflow
May 25, 2009 · A JOIN is a means for combining fields from two tables by using values common to each. The SQL UNION operator combines the result of two or more SELECT statements.
Conditional JOIN Statement SQL Server - Stack Overflow
Oct 22, 2014 · Is it possible to do the following: IF [a] = 1234 THEN JOIN ON TableA ELSE JOIN ON TableB If so, what is the correct syntax?