May 2005
Intermediate to advanced
352 pages
14h 39m
English
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Name
ANALYSE( )
Synopsis
ANALYSE([column[,memory]])
This function returns an analysis of
a results table from a SELECT statement.
The \G at the end of the following statement
provides a vertical output. Use this function only as part of a
PROCEDURE clause. The default values are 256 per
column and 8,192 for memory.
SELECT col1
FROM table1
PROCEDURE ANALYSE( ) \G
*************************** 1. row ***************************
Field_name: table1.col1
Min_value: 1
Max_value: 82
Min_length: 1
Max_length: 2
Empties_or_zeros: 0
Nulls: 0
Avg_value_or_avg_length: 42.8841
Std: 24.7600
Optimal_fieldtype: TINYINT(2) UNSIGNED NOT NULLYou can specify the maximum number of elements to analyze for each column in the optional first argument, and the maximum amount of memory that may be used in the optional second argument.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.