May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Creating and using variables
A variable lets you store a single data value that can be used during your session's queries. You can only store a limited set of data types in a variable. These include string, integer, decimal, float, or NULL. If you use a different type in your variable, it will be converted into one of the permitted types listed previously.
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