Summary: in this tutorial, you will learn how to use PostgreSQL Show Introduction to PostgreSQL RANK() functionThe For each partition, the rank of the first row is 1. The The following illustrates the syntax of the
In this syntax:
The PostgreSQL RANK() function demoFirst, create a new table named 7 that contains one column:
Second, insert some rows into the 7 table:
Third, query data from the 7 table:
Fourth, use the 7 table:
The following picture shows the output: As you can see clearly from the output:
PostgreSQL RANK() function examplesWe’ll use the 6 table to demonstrate the RANK() function:This picture shows the data of the 6 table: 1) Using PostgreSQL RANK() function for the whole result setThis example uses the
In this example, we omitted the 2 clause, therefore, the RANK() function treated the whole result set as a single partition.The 2) Using PostgreSQL RANK() function with CREATE TABLE ranks ( c VARCHAR(10) );2 clause exampleThe following example uses the
In this example:
The In this tutorial, you have learned how to use the PostgreSQL |