SQL functions for stratified sampling. More...

Functions
void	stratified_sample (text source_table, text output_table, float8 proportion, text grouping_cols, text target_cols, boolean with_replacement)

void	stratified_sample (text source_table, text output_table, float8 proportion, text grouping_cols, text target_cols)

void	stratified_sample (text source_table, text output_table, float8 proportion, text grouping_cols)

void	stratified_sample (text source_table, text output_table, float8 proportion)

varchar	stratified_sample (varchar message)

varchar	stratified_sample ()

Detailed Description

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Date: 07/19/2017

See also: Given a table, stratified sampling returns a proportion of records for each group (strata).

Function Documentation

◆ stratified_sample() [1/6]

void stratified_sample	(	text	source_table,
		text	output_table,
		float8	proportion,
		text	grouping_cols,
		text	target_cols,
		boolean	with_replacement
	)

◆ stratified_sample() [2/6]

void stratified_sample	(	text	source_table,
		text	output_table,
		float8	proportion,
		text	grouping_cols,
		text	target_cols
	)

◆ stratified_sample() [3/6]

void stratified_sample	(	text	source_table,
		text	output_table,
		float8	proportion,
		text	grouping_cols
	)

◆ stratified_sample() [4/6]

void stratified_sample	(	text	source_table,
		text	output_table,
		float8	proportion
	)

◆ stratified_sample() [5/6]

varchar stratified_sample ( varchar message )

◆ stratified_sample() [6/6]

varchar stratified_sample ( )

Functions