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Mongo: find items that don't have a certain field
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171
Yeah, it's possible using $exists:
db.things.find( { a : { $exists : false } } ); // return i...
How to compare dates in datetime fields in Postgresql?
...ithout timezone'. Client can search over this field with only date (i.e: 2013-05-03) or date with time (i.e: 2013-05-03 12:20:00). This column has the value as timestamp for all rows currently and have the same date part(2013-05-03) but difference in time part.
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Get Android .apk file VersionName or VersionCode WITHOUT installing apk
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edited Feb 7 '17 at 18:08
ToolmakerSteve
5,19977 gold badges6161 silver badges133133 bronze badges
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Rails nested form with has_many :through, how to edit attributes of join model?
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edited Dec 3 '14 at 5:31
answered Feb 17 '10 at 7:16
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Proper package naming for testing with the Go language
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134
The fundamental difference between the three strategies you've listed is whether or not the te...
Error: No default engine was specified and no extension was provided
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13 Answers
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MySQL join with where clause
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291
You need to put it in the join clause, not the where:
SELECT *
FROM categories
LEFT JOIN user_c...
JavaScript - cannot set property of undefined
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161
you never set d[a] to any value.
Because of this, d[a] evaluates to undefined, and you can't ...