Where to Specify Data Types - Firebird
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Job SearchA data type is defined for data items in the following situations:
- Specifying column definitions in a CREATE TABLE specification
- Creating a reusable global column template using CREATE DOMAIN
- Modifying a global column template using ALTER DOMAIN
- Adding a new column to a table or altering a column using ALTER TABLE
- Declaring arguments and local variables in stored procedures and triggers
- Declaring arguments and return values for external (user-defined) functions
