what is foreign key in sql
Foreign Key:
It is a column that comes from a different table and
using Foreign key tables are related each other
It is the primary key of another table
It can be duplicate or null for another tablewhat is foreign key in sql
Foreign Key:
It is a column that comes from a different table and
using Foreign key tables are related each other
It is the primary key of another table
It can be duplicate or null for another tableforeign key in sql dbms
FOREIGN KEY (fk_col_name)
REFERENCES target_table_name (pk_col_name);how to make foreign key in sql
how to make primary key and foreign key in sqlCopyright © 2021 Codeinu
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