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How to test if a string is JSON or not?
... with useful data or an error message string produced by the PHP function mysql_error() . How can I test whether this data is a JSON string or the error message.
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What are some good Python ORM solutions? [closed]
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It should be noted that Storm only supports MySQL and PostgreSQL at the current moment. Oracle support is in the works though.
– Jason Baker
Aug 6 '09 at 16:25
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Laravel Migration Change to Make a Column Nullable
...n hang. I suppose the first rollback causes this. Causes hanging tests for MySQL as well as for SQLite.
– Thomas Praxl
Jul 19 '18 at 11:49
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List all sequences in a Postgres db 8.1 with SQL
I'm converting a db from postgres to mysql.
19 Answers
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Database Design for Tagging
...s-performance-tests/
Note that the conclusions there are very specific to MySQL, which (at least in 2005 at the time that was written) had very poor full text indexing characteristics.
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Linq to Objects: does GroupBy preserve order of elements?
...her fields than the group key, you saved my day with your comment. LINQ to MySql sorts the groups automagically by the group key! I've had to use ToList to bring the ordered query to local objects, then group over that. Thank you.
– Ivan Ferrer Villa
Dec 3 '19 ...
Migration: Cannot add foreign key constraint
... $table->engine = 'InnoDB'; is required to enforce foreign key at MySql level. The default laravel engine is MyIsam wich not support foreign keys !
– François Breton
Oct 9 '15 at 18:16
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Unioning two tables with different number of columns
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phpmyadmin logs out after 1440 secs
In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database.
24 Answers
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On Duplicate Key Update same as insert
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There is a MySQL specific extension to SQL that may be what you want - REPLACE INTO
However it does not work quite the same as 'ON DUPLICATE UPDATE'
It deletes the old row that clashes with the new row and then inserts the new row. ...