AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Sqlite foreign key clauses2/18/2024 ![]() The following are some instances of well-known DBMS: To remove a foreign key from a table requires execution of the correct SQL statement, which will be different for each database management system (DBMS). After the REFERENCE clause we need to specify the Primary key and the table table that is being referred.The column name that serves as the foreign key will come after the ADD FOREIGN KEY clause.Now we are altering the same table using the ALTER TABLE clause in dbms.Here the table Retailer is an existing table containing Retailer_id as an attribute. ![]() The following method will illustrate the same. These foreign key refers to the two columns of parent table Customer – Customer_id, Payment_id Method 4: SQL FOREIGN KEY ON ALTER TABLEįoreign key can also be added in the existing table. The constraint customer_payment_id is a foreign key containing two columns Customer_id and Payment_id. ![]() The above examples show reference of foreign keys consisting of more than one attribute. REFERENCES Customer(customerId, paymentId) Software Engineering Interview Questions.Top 10 System Design Interview Questions and Answers.Top 20 Puzzles Commonly Asked During SDE Interviews.Commonly Asked Data Structure Interview Questions.Top 10 algorithms in Interview Questions.Top 20 Dynamic Programming Interview Questions.Top 20 Hashing Technique based Interview Questions.Top 50 Dynamic Programming (DP) Problems.Top 20 Greedy Algorithms Interview Questions.Top 100 DSA Interview Questions Topic-wise.
0 Comments
Read More
Leave a Reply. |