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How to do 3 table JOIN in UPDATE query?
....column_b
JOIN TABLE_C c ON [condition]
SET a.column_c = a.column_c + 1
EDIT:
For general Update join :
UPDATE TABLEA a
JOIN TABLEB b ON a.join_colA = b.join_colB
SET a.columnToUpdate = [something]
shar...
How long should SQL email fields be? [duplicate]
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179
The theoretical limit is really long but do you really need worry about these long Email addre...
Setting environment variables for accessing in PHP when using Apache
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161
Something along the lines:
<VirtualHost hostname:80>
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SetEnv VARIABLE_NAME...
How to strip all whitespace from string
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11 Answers
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How can I use an array of function pointers?
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10 Answers
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git push fails: RPC failed; result=22, HTTP code = 411
...ay get an error message such as error: RPC failed; result=22, HTTP code = 411. This is caused by a Git configuration default which limits certain HTTP operations to 1 megabyte.
To change this limit run within your local repository
git config http.postBuffer *bytes*
where bytes is the maximum num...
Using FileSystemWatcher to monitor a directory
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146
The problem was the notify filters. The program was trying to open a file that was still copyi...
Is an index needed for a primary key in SQLite?
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150
It does it for you.
INTEGER PRIMARY KEY columns aside, both UNIQUE and PRIMARY KEY
const...
C# pattern to prevent an event handler hooked twice [duplicate]
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151
Explicitly implement the event and check the invocation list. You'll also need to check for nu...
What are the differences between local branch, local tracking branch, remote branch and remote track
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124
A local branch is a branch that only you (the local user) can see. It exists only on your loca...