• define columns in a database table in the statement or change columns using ALTER TABLE

    • declare local variables in stored procedures, PSQL blocks and triggers and specify parameters in stored procedures

    • provide arguments for the CAST() function when explicitly converting data from one type to another

    Note About Dates

    Bear in mind that a time series consisting of dates in past centuries is processed without taking into account the actual historical facts, as though the Gregorian calendar were applicable throughout the entire series.