postgresqlHow do I replace values in a PostgreSQL database?

Replacing values in a PostgreSQL database is a fairly straightforward process. The following example code block shows how to replace a value in a PostgreSQL table:

UPDATE table_name
SET column_name = 'new_value'
WHERE condition;

Here, table_name is the name of the table, column_name is the name of the column, and condition is the condition that must be met for the value to be replaced. For example, if you wanted to replace the value of the name column in the users table with the value John, you would use the following code:

UPDATE users
SET name = 'John'
WHERE id = 1;

This code would replace the value of the name column in the users table for the row where id is equal to 1.

Code explanation

• UPDATE - This keyword is used to indicate that the values of one or more columns in a table should be updated.
• users - This is the name of the table.
• SET - This keyword is used to indicate which column should be updated and what its new value should be.
• name = 'John' - This is the column name and its new value.
• WHERE - This keyword is used to specify the condition that must be met for the value to be replaced.
• id = 1 - This is the condition that must be met for the value to be replaced.

Helpful links

• PostgreSQL Documentation
• PostgreSQL Tutorial

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