Showing posts with label Oracle Analytical Functions. Show all posts
Showing posts with label Oracle Analytical Functions. Show all posts

Wednesday, August 12, 2020

Oracle Analytical Functions

The below is the compiled list of analytical & advanced functions in Oracle SQL*Plus. Some of them are widely used ones which we will be discussed in detail in the upcoming articles.  

Name

Description

CORR

CORR returns the coefficient of correlation of a set of number pairs. You can use it as an aggregate or analytic function.

COVAR_POP

COVAR_POP returns the population covariance of a set of number pairs. You can use it as an aggregate or analytic function.

COVAR_SAMP

COVAR_SAMP returns the sample covariance of a set of number pairs. You can use it as an aggregate or analytic function.

CUME_DIST

Calculate the cumulative distribution of a value in a set of values

DENSE_RANK

Calculate the rank of a row in an ordered set of rows with no gaps in rank values.

FIRST_VALUE

Get the value of the first row in a specified window frame.

LAG

Provide access to a row at a given physical offset that comes before the current row without using a self-join.

LAST_VALUE

Get the value of the last row in a specified window frame.

LEAD

Provide access to a row at a given physical offset that follows the current row without using a self-join.

NTH_VALUE

Get the Nth value in a set of values.

NTILE

Divide an ordered set of rows into a number of buckets and assign an appropriate bucket number to each row.

STDDEV

STDDEV is a built-in function which returns the standard deviation of a set of numbers, i.e. the square root of the variance for the input number set. It can be used as both an Aggregate and an Analytic function.

VARIANCE

VARIANCE returns the variance of expr . You can use it as an aggregate or analytic function. Oracle Database calculates the variance of expr as follows: 0 if the number of rows in expr = 1.

VAR_POP

VAR_POP returns the population variance of a set of numbers after discarding the nulls in this set. You can use it as both an aggregate and analytic function.

VAR_SAMP

VAR_SAMP returns the sample variance of a set of numbers after discarding the nulls in this set. You can use it as both an aggregate and analytic function.

PERCENT_RANK

Calculate the percent rank of a value in a set of values.

RANK

Calculate the rank of a value in a set of values

ROW_NUMBER

Assign a unique sequential integer starting from 1 to each row in a partition or in the whole result

CLUSTER_DETAILS

CLUSTER_DETAILS returns cluster details for each row in the selection. The return value is an XML string that describes the attributes of the highest probability cluster or the specified cluster_id.

FEATURE_DETAILS

FEATURE_DETAILS returns feature details for each row in the selection. The return value is an XML string that describes the attributes of the highest value feature or the specified feature_id.

PREDICTION_DETAILS

PREDICTION_DETAILS returns prediction details for each row in the selection. The return value is an XML string that describes the attributes of the prediction.

LISTAGG

The LISTAGG function concatenates values of the measure_column for each GROUP based on the order_by_clause.

RATIO_TO_REPORT

RATIO_TO_REPORT computes the ratio of a value to the sum of a set of values. If expr evaluates to null, then the ratio-to-report value also evaluates to null.

 

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