SELECT 1 from table
select * from StudentTable;
-- output :
+------+-------+
| id | name |
+------+-------+
| 1 | John |
| 2 | Carol |
| 3 | Smith |
| 4 | Bob |
+------+-------+
4 rows in set (0.00 sec)
-- EXAMPLE OF SELECT 1
select 1 from StudentTable;
-- output :
+---+
| 1 |
+---+
| 1 |
| 1 |
| 1 |
| 1 |
+---+
4 rows in set (0.00 sec)
-- The above returns 1 four times for 4 records,
-- and if we had 5 records then the above query
-- would have returned 1 five times.select 1 from orders
select 1 from table will return the constant 1 for every row of the table. It's useful when you want to cheaply determine if record matches your where clause and/or join.Copyright © 2021 Codeinu
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