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MySQL Error 1093 - Can't specify target table for update in FROM clause
...ted subquery in the FROM clause creates an implicit temporary
table, so it doesn't count as the same table you're updating.
... but watch out for the query optimiser
However, beware that from MySQL 5.7.6 and onward, the optimiser may optimise out the subquery, and still give you the error. Luckil...
Are database triggers evil? [closed]
...that a trigger is causing an unexpected result if it occurs to you (as it does to me) to look there. If I get an error saying a table that I'm not referencing in my sp has an FK error, I know without even thinking about it that trigger is causing the problem and so should any competent database dev...
Maven Run Project
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This does not actully run the main class
– Dexter
May 20 at 8:44
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How do I programmatically determine if there are uncommitted changes?
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And haridsv points out in the comments that git diff-files on a new file doesn't detect it as a diff.
The safer approach seems to be to run git add on the file spec first and then use git diff-index to see if anything got added to index before running git commit.
git add ${file_args} && \...
diff to output only the file names
...y looking for missing files (especially across network shares), because it doesn't compare the contents. This helped me find a few files that failed when migrating to a new NAS.
– OverZealous
Dec 26 '15 at 18:26
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Is it possible to insert multiple rows at a time in an SQLite database?
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How does this solution or the 3.7.11 solution compare to using transaction blocks? is it faster to insert into t values (data),(data),(data) or begin transaction; insert into t values (data);insert into t values (data);insert int...
Use of class definitions inside a method in Java
...nd an example here. The example returns a specific implementation which we doesn't need to know about outside the method.
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Why can Java Collections not directly store Primitives types?
...0% in the compiler without support from the JVM. The JVM being what it is, doesn't support a "non-object" object. Java generics allow you to pretend there is no wrapper, but you still pay the performance price of boxing. This is IMPORTANT for certain classes of programs.
Boxing is a technical compr...
Getting current device language in iOS?
...Array *)preferredLanguages NS_AVAILABLE(10_5, 2_0); // note that this list does not indicate what language the app is actually running in; the [NSBundle mainBundle] object determines that at launch and knows that information
People interested in app language take a look at @mindvision's answer
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What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?
...'t, then you have HTML with inappropriately added XHTML DOCTYPE.
DOCTYPE does not change how document is interpreted. Only MIME type does.
W3C decision about ignoring DOCTYPE:
The HTML WG has discussed this issue: the intention was to allow old
(HTML-only) browsers to accept XHTML 1.0 docum...