Question: Explain the difference between INNER JOIN and LEFT JOIN in PostgreSQL.Answer: INNER JOIN retrieves rows where there is a match in both tables, while LEFT JOIN retrieves all rows from the left table and matching rows from the right table. |
Simpan untuk Revisi
Bookmark item ini, tandai sebagai sulit, atau masukkan ke dalam set revisi.
Masuk untuk menyimpan bookmark, pertanyaan sulit, dan set revisi.
Apakah ini membantu? Ya Tidak
Most helpful rated by users:
- Explain the concept of ACID properties in the context of databases.
- What is the purpose of the WHERE clause in a PostgreSQL query?
- What is a foreign key, and how does it enforce referential integrity?
- Explain the purpose of the SERIAL data type in PostgreSQL.