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Difference Between Schema / Database in MySQL
Is there a difference between a schema and a database in MySQL? In SQL Server, a database is a higher level container in relation to a schema.
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Are Databases and Functional Programming at odds?
...database level not through the user interface), performance, and security. SQL is written to manage the first two considerations more effectively than any front end language. Because it is specifically designed to do that. The task of a database is far different than the task of a user interface. Is...
How to list the tables in a SQLite database file that was opened with ATTACH?
What SQL can be used to list the tables, and the rows within those tables in an SQLite database file - once I have attached it with the ATTACH command on the SQLite 3 command line tool?
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Inserting a Python datetime.datetime object into MySQL
I have a date column in a MySQL table. I want to insert a datetime.datetime() object into this column. What should I be using in the execute statement?
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INNER JOIN ON vs WHERE clause
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It's easier to see this with the WHERE syntax.
As for your example, in MySQL (and in SQL generally) these two queries are synonyms.
Also note that MySQL also has a STRAIGHT_JOIN clause.
Using this clause, you can control the JOIN order: which table is scanned in the outer loop and which one is i...
mysqldump data only
I am looking for the syntax for dumping all data in my mysql database. I don't want any table information.
8 Answers
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MySQL OPTIMIZE all tables?
MySQL has an OPTIMIZE TABLE command which can be used to reclaim unused space in a MySQL install. Is there a way (built-in command or common stored procedure) to run this optimization for every table in the database and/or server install, or is this something you'd have to script up yourself?
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How can I define a composite primary key in SQL?
How can I define a composite primary key consisting of two fields in SQL?
3 Answers
3
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How to add new column to MYSQL table?
I am trying to add a new column to my MYSQL table using PHP. I am unsure how to alter my table so that the new column is created. In my assessment table I have:
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What's the best strategy for unit-testing database-driven applications?
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I'm always running tests against an in-memory DB (HSQLDB or Derby) for these reasons:
It makes you think which data to keep in your test DB and why. Just hauling your production DB into a test system translates to "I have no idea what I'm doing or why and if something break...