Oracle / PLSQL: COVAR_SAMP Function
This Oracle tutorial explains how to use the Oracle/PLSQL COVAR_SAMP function with syntax and examples.
Description
The Oracle/PLSQL COVAR_SAMP function returns the sample covariance of a set of number pairs.
Syntax
The syntax for the COVAR_SAMP function in Oracle/PLSQL is:
COVAR_SAMP( expression1, expression2 )
- expression1
- A numeric expression that is used in the calculation.
- expression2
- A numeric expression that is used in the calculation.
Returns
The COVAR_SAMP function returns a numeric value.
Note
- The COVAR_SAMP function eliminates all pairs where expression1 or expression2 has a null value.
Applies To
The COVAR_SAMP function can be used in the following versions of Oracle/PLSQL:
- Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i, Oracle 8i
Example
Let's look at some Oracle COVAR_SAMP function examples and explore how to use the COVAR_SAMP function in Oracle/PLSQL.
For example:
select owner, COVAR_SAMP(avg_row_len, avg_space) from all_tables group by owner;
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