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How Do I Get the Week Number From a Specific Date in PostgreSQL

Use the EXTRACT() or DATE_PART() function along with the “week” argument to get a week number from a particular date or timestamp.

How to Use GROUP BY Clause on Multiple Columns in PostgreSQL

In PostgreSQL, multiple columns can be used with the GROUP BY clause. Specify a comma between the columns to be grouped when using the GROUP BY clause on multiple columns.

How to Fix the “must appear in the GROUP BY clause” Error in PostgreSQL

A "must appear in the GROUP BY clause" error occurs in PostgreSQL when a column is specified in the SELECT statement but it is not utilized in the GROUP BY clause or any aggregate function.

What Does JUSTIFY_INTERVAL() Function Do in PostgreSQL?

JUSTIFY_INTERVAL() is a built-in DateTime function that utilizes the JUSTIFY_DAYS() and JUSTIFY_HOURS() functions with sign adjustments to adjust the intervals.

How to Use JUSTIFY_HOURS() Function in PostgreSQL

In PostgreSQL, a built-in DateTime function named JUSTIFY_HOURS() is used to adjust the 24-hour time periods to days.

PostgreSQL CLOCK_TIMESTAMP() Function

In PostgreSQL, the “CLOCK_TIMESTAMP()” function helps us in getting the current DateTime of a database that may change during query execution.

What Does JUSTIFY_DAYS() Function Do in PostgreSQL

In PostgreSQL, a built-in DateTime function named JUSTIFY_DAYS() is used to adjust the 30-day time periods to months.

How to Check Sequence Details in PostgreSQL

In PostgreSQL, the “\d” command and “information_schema.sequences” are used to describe a specific sequence.

How to Find Maximum and Minimum Values From a PostgreSQL Table

In PostgreSQL, the MIN() and MAX() functions can be utilized to retrieve the minimum and maximum values among the list of given values.

How to Upgrade PostgreSQL on CentOS 7?

To Upgrade PostgreSQL on CentOS 7, add the appropriate repository, stop PostgreSQL, upgrade PostgreSQL, restart PostgreSQL, verify the upgrade, and test the application compatibility.