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The SELECT
clause specifies the list of columns that will be returned by the query. While it appears first in the clause, logically the expressions here are executed only at the end. The SELECT
clause can contain arbitrary expressions that transform the output, as well as aggregates and window functions.
Examples
-- select all columns from the table called "table_name"
SELECT * FROM table_name;
-- select all unique cities from the addresses table
SELECT DISTINCT city FROM addresses;
-- return the total number of rows in the addresses table
SELECT COUNT(*) FROM addresses;
-- select all columns except the city column from the addresses table
SELECT * EXCLUDE (city) FROM addresses;
-- select all columns from the addresses table, but replace city with LOWER(city)
SELECT * REPLACE (LOWER(city) AS city) FROM addresses;
-- select all columns matching the given regex from the table
SELECT COLUMNS('number\d+') FROM addresses;
-- compute a function on all given columns of a table
SELECT MIN(COLUMNS(*)) FROM addresses;
Syntax
Search Shortcut cmd + k | ctrl + k