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How do you manage databases in development, test, and production?
...s readable also at http://martinfowler.com/articles/evodb.html
In one PHP+MySQL project I've had the database revision number stored in the database, and when the program connects to the database, it will first check the revision. If the program requires a different revision, it will open a page fo...
What is a stored procedure?
... For more detail about stored procedure you can refer my URL techflirt.com/mysql-stored-procedure-tutorial
– Ankur Kumar Singh
Mar 4 '18 at 5:25
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Should each and every table have a primary key?
...most probably, you are missing something. Why keep identical records?
In MySQL, the InnoDB storage engine always creates a primary key if you didn't specify it explicitly, thus making an extra column you don't have access to.
Note that a primary key can be composite.
If you have a many-to-many l...
PostgreSQL: Modify OWNER on all tables simultaneously in PostgreSQL
...functions as the signature is part of the function name. Granted, I have a MySQL background and am not that familiar with Postgres.
However, pg_dump allows you to dump just the schema and this contains the ALTER xxx OWNER TO yyy; statements you need. Here is my bit of shell magic on the topic
pg_d...
Entity Framework vs LINQ to SQL
...oject "dblinq" replaces the LINQ to SQL assembly with one that can talk to MySQL, PostgreSQL, Ingres, Firebird, SQLite ... and Microsoft SQL (of course).
– Contango
Dec 24 '10 at 11:41
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What is the optimal length for an email address in a database?
... then you can/must use a VARCHAR(254) to store an email address.
Note: In MySQL at least, a column declared as VARCHAR whit less or equal than 255 octets will be all stored as 1 byte + length (the 1 is to store the length) so no space is gained if used a lower limit.
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How can I join multiple SQL tables using the IDs?
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Not the answer you're looking for? Browse other questions tagged mysql sql join or ask your own question.
Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
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Note, MySQL doesn't allow default values on TEXT/BLOB columns. Otherwise this is the ideal solution
– Andrew Vit
Mar 20 '13 at 18:35
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PostgreSQL create table if not exists
In a MySQL script you can write:
6 Answers
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Django - How to rename a model field using South?
...e slower than the 'rename_column' that other people have suggested. I know MySQL can do a "ALTER TABLE ... rename column" (or whatever it is) quite quickly.
– Rory
Jul 18 '11 at 10:01
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