Select * from student
Select * from student where name="Anna"
The two other * represent? The second sentence added after the where is the difference between two sentences?
CodePudding user response:
1. * on behalf of all fields, if you don't write * can also write the select field 1, 2 the from field student in this way,2, where is the search criteria, plus the where, only to search out the name is Anna, other name can't search out