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to the MySQL server providing the ability to:
* calculate the median of any values,
* calculate the skewness and kurtosis of a distribution of value
* retrieve the effective length of the longest value in a STRING column,
* get the longest value from a STRING column,
* calculate the faculty of a value,
* calculate linear regression parameters (intercept, slope, correlation
coefficent) of any values
WWW: http://mysql-udf.sourceforge.net/
25 lines
1.4 KiB
Text
25 lines
1.4 KiB
Text
To add the custom functions to your MySQL server use the following syntax:
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(you may install only the functions you need):
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CREATE AGGREGATE FUNCTION median RETURNS REAL SONAME 'udf_median.so';
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CREATE AGGREGATE FUNCTION correlation RETURNS REAL SONAME 'udf_correlation.so';
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CREATE AGGREGATE FUNCTION intercept RETURNS REAL SONAME 'udf_intercept.so';
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CREATE AGGREGATE FUNCTION slope RETURNS REAL SONAME 'udf_slope.so';
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CREATE AGGREGATE FUNCTION skewness RETURNS REAL SONAME 'udf_skewness.so';
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CREATE AGGREGATE FUNCTION kurtosis RETURNS REAL SONAME 'udf_kurtosis.so';
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CREATE FUNCTION confidence_higher RETURNS REAL SONAME 'udf_confidence_higher.so';
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CREATE FUNCTION confidence_lower RETURNS REAL SONAME 'udf_confidence_lower.so';
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CREATE FUNCTION stdnorm_density RETURNS REAL SONAME 'udf_stdnorm_density.so';
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CREATE FUNCTION stdnorm_dist RETURNS REAL SONAME 'udf_stdnorm_dist.so';
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CREATE AGGREGATE FUNCTION geomean RETURNS REAL SONAME 'udf_geomean.so';
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CREATE AGGREGATE FUNCTION weightedavg RETURNS REAL SONAME 'udf_weightedavg.so';
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CREATE FUNCTION noverm RETURNS INTEGER SONAME 'udf_noverm.so';
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CREATE FUNCTION faculty RETURNS REAL SONAME 'udf_faculty.so';
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CREATE AGGREGATE FUNCTION COLWIDTH RETURNS INTEGER SONAME 'udf_colwidth.so';
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CREATE AGGREGATE FUNCTION LONGEST RETURNS STRING SONAME 'udf_longest.so';
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Example for deinstalling a function:
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DROP FUNCTION median;
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For function descriptions, see the following webpage:
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http://mysql-udf.sourceforge.net/
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