In Postgresql, we can return nothing or null when using the if-else statement, which means when the expression will true, then it returns the value otherwise returns nothing. In Postgresql, we can update the data using an if-else statement, we will use the employee table which contains a column named gender. In the above output, the gender column has two types of values M and F. So run the below code to update the M to Male or F to Female of column gender. Create a free Team What is Teams?
Learn more. Asked 3 years, 5 months ago. Active 1 year, 2 months ago. Viewed 14k times. Improve this question. Rajesh Ranjan Rajesh Ranjan 1, 2 2 gold badges 12 12 silver badges 31 31 bronze badges. Add a comment. We just looked at an example of how to update the value of specified rows in our sample table. In an update statement, the WHERE clause defines the condition which a row in a table must meet in order to be updated.
Without this clause, all rows will be updated and their respective values will be changed to the value passed to SET. This will give the employees both a promotion and a raise:. To escape a string in order to use characters such as apostrophes in it, simply use two single quotes in a row. We hate spam and make it easy to unsubscribe.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 8 years, 6 months ago. Active 5 years, 7 months ago. Viewed 15k times. I have removed my answer and downvote after your clarifications. Your update makes sense.
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