An SQL JOIN returns rows combined from two tables and possibly satisfying a condition. Sign up to watch this tag and see more personalized content

Jul 12, 2011 · php mysql zend-framework join edited Jul 12, 2011 at 12:04 Maxim Krizhanovsky 26.8k 5 62 91

1. For INNER JOIN any condition can be in a WHERE instead of an ON as long as there is no intervening OUTER JOIN. 2. When moving a LEFT JOIN condition from an ON to a WHERE …

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 …

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(

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 …

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 …

@Hannele straight_join evaluates left table before right. So if you want to go from A -> B -> C in my example, the first join keyword could be replaced with straight_join.

For more parts or more complex strings, they either use string formatting, like above, or assemble elements in a list and join them together (especially if there's any form of looping involved.) …

Jun 4, 2015 · Your updated jsperf compares apples with oranges. If you already have an array, yes, join is faster. But what people are comparing is creating an array just to join it, vs. doing …