Tag: defer constraints

Assertions and Deferability of Constraints

Assertions and Deferability of Constraints

January 10, 2019 | By | Add a Comment

Constraints are rules that you establish to restrict the values that can be placed in your columns. In basic SQL, constraints are contained in the definitions of base tables and are of two kinds: column constraints and table constraints. The former is part of a column definition and check their rules whenever a statement attempts […]

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