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2025-01-18 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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mysql-foreign key
Parent table: t_grade
Child table: t_student
When inserting data into a word table, there must be a corresponding parent table record. If there is no corresponding related record in the parent table, the data insertion of the child table fails.
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