RaqForum 41 No.
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SQL, get median of all columns in each row

 

In PostgreSQL database, table T has multiple numeric columns:

X

Y

Z

1

6

3

3

2

5

6

NULL

3

4

5

6

4

11

7

8

We want to find the median of all column values in each row. Below is the expected result:

MEDIAN

1

3

2

5

3

5

4

8

Write the following SPL code:

A

1

=pg1.query("select * from T")

2

=A1.new(~.array().median())

new()function creates a new two-dimensional table; ~ represents the current record; array() function converts field values of a record to a sequence.

Source:https://stackoverflow.com/questions/78449368/how-to-get-the-row-wise-median-over-several-columns-of-a-postgresql-table


 
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