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mysql update column with value from another table
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Second possibility is,
UPDATE TableB
SET TableB.value = (
SELECT TableA.value
FROM TableA
WHERE TableA.name = TableB.name
);
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Group by in LINQ
... p in persons
group p.car by p.PersonId into g
select new { PersonId = g.Key, Cars = g.ToList() };
Or as a non-query expression:
var results = persons.GroupBy(
p => p.PersonId,
p => p.car,
(key, g) => new { PersonId = key, Cars = g.ToList() });
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SQL Server Output Clause into a scalar variable
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But then I'd have to "SELECT @someInt = ID FROM @ID". I wanted to know if its possible to skip that extra step (and intermediary table variable) if all I need is the resulting int.
– Benoittr
Apr 5 '11 at 21:...
jQuery - select the associated label element of a input field [duplicate]
I have a set of input fields, some of them have labels associated, some not:
3 Answers
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android button selector
This is a button selector such that when normal it appears red, when pressed it appears grey.
6 Answers
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How to have a default option in Angular.js select box
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You can simply use ng-init like this
<select ng-init="somethingHere = options[0]"
ng-model="somethingHere"
ng-options="option.name for option in options">
</select>
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How to read a local text file?
...tion that takes in the file’s path and converts each line of text into a char array, but it’s not working.
20 Answers
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How do I submit disabled input in ASP.NET MVC?
...l be submitted to the server while still being non-editable by the user. A SELECT tag is an exception though.
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iOS JavaScript bridge
...NSString *)bar;
- (void)testfoo;
+ (BOOL)isKeyExcludedFromWebScript:(const char *)name;
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector;
+ (WebScriptBridge*)getWebScriptBridge;
@end
static WebScriptBridge *gWebScriptBridge = nil;
@implementation WebScriptBridge
- (void)someEvent: (uint64_t)...
How to test an SQL Update statement before running it?
...yway) you can also do a sanity check which rows are affected by running a select using the same WHERE clause as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
The following will show you which rows will be updated:
SELECT *
FROM foo
WHERE col1 ...