Postgresql update set subquery

By Priya Pedamkar. PostgreSQL Subquery is also known as the nested query or inner query; it is the query within another query and embedded within where clause. It is used to returns data that will be used in the main query as a condition to restrict the data further to be retrieved. There are many rules available to use a subquery in PostgreSQL. Which technique is more appropriate depends on the specific circumstances.

The new post-update values of the table's columns are used. See Section 7. The name optionally schema-qualified of the table to update. If ONLY is specified before the table name, matching rows are updated in the named table only. If ONLY is not specified, matching rows are also updated in any tables inheriting from the named table. A substitute name for the target table. When an alias is provided, it completely hides the actual name of the table.

The name of a column in table. Keep Coding : — Mayur. Thanks for putting up all the options. How about the performance? Are they about the same? Festus Ngor Festus Ngor 1 1 silver badge 4 4 bronze badges. Pugazendhi Asaimuthu Pugazendhi Asaimuthu 1 1 silver badge 2 2 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Viewed 8k times. Thank you in advance. Improve this question. Sorry I forgot to state that. I use PostgSQL 9.

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