The SQL cast specification converts a value to the named data type.
SELECT CAST(column_name AS INTEGER)
FROM …Integer/int in other places: column type.
Product specific cast functions: try_cast, safe_cast, ::, convert.
ISO/IEC 9075:2016-2 defines integer (E011-01) and the cast specification (F201).
Markus Winand is the SQL Renaissance Ambassador. He is on a mission to introduce developers to the evolution of SQL in the 21st century. Markus can be hired as trainer, speaker and consultant via winand.at.
The essence of SQL tuning in 200 pages
Buy on Amazon
(paperback only)
Paperback and PDF also available at Markus’ store.
Markus offers SQL training and consulting for developers working at companies of any size.
Learn more »