What are string constants in PostgreSQL?

1.	What are string constants in PostgreSQL?
Answer» They are character SEQUENCES bound within single quotes. These are using during data insertion or updation to characters in the database. There are special string constants that are quoted in dollars. Syntax: $tag$<string_constant>$tag$ The tag in the CONSTANT is optional and when we are not specifying the tag, the constant is CALLED a double-dollar string LITERAL.

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