2023年9月6日 — Left join. A left join or left outer join returns all the values in the leftmost tables based on the key column, even if there are no matching ...
The LEFT JOIN command returns all rows from the left table, and the matching rows from the right table. The result is NULL from the right side, if there is no ...
The SQL LEFT JOIN combines two tables based on a common column. It then selects records having matching values in these columns and the remaining rows from the ...
The LEFT JOIN keyword returns all records from the left table (table1), and the matching records from the right table (table2). The result is 0 records from the ...