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Why should you use an ORM? [closed]
...nd portable. ORM implementation classes know how to write vendor-specific SQL, so you don't have to.
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Truncating all tables in a Postgres database
I regularly need to delete all the data from my PostgreSQL database before a rebuild. How would I do this directly in SQL?
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Database development mistakes made by application developers [closed]
...xists--you should be using it.
It's quite common to see this failure on MySQL databases. I don't believe MyISAM supports it. InnoDB does. You'll find people who are using MyISAM or those that are using InnoDB but aren't using it anyway.
More here:
How important are constraints like NOT NULL a...
How to count occurrences of a column value efficiently in SQL?
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FYI, On SQL Server 2005, the second query runs with almost half the execution cost (using SET SHOWPLAN_ALL ON) as the first. I thought the first would have been better, but the old school join beat it.
– KM.
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How to import CSV file data into a PostgreSQL table?
..._codes FROM '/path/to/csv/ZIP_CODES.txt' DELIMITER ',' CSV HEADER; postgresql.org/docs/9.1/static/sql-copy.html
– Barrett Clark
Nov 8 '13 at 15:17
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Rails: Using greater than/less than with a where statement
... it possible for the user to enter the value, it avoids the possibility of SQL injection attacks)
– user1051849
Nov 4 '14 at 11:21
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Multiple Indexes vs Multi-Column Indexes
I've just been adding an Index to a table in SQL Server 2005 and it got me thinking. What is the difference between creating 1 index and defining multiple columns over having 1 index per column you want to index.
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Rails 4 LIKE query - ActiveRecord adds quotes
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Isn't this vulnerable to SQL Injection? I mean, are those search strings sanitized?
– jdscosta91
Oct 16 '14 at 17:08
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How Pony (ORM) does its tricks?
Pony ORM does the nice trick of converting a generator expression into SQL. Example:
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How can I create a copy of an Oracle table without copying the data?
... The command in my answer doesn't create the new table; it returns the SQL you would use to recreate the original table. You modify it as desired then run it. So the name of the new table is whatever you choose to specify.
– Dave Costa
Jul 18 '13 at 15:50...