String sql = "update actor set actor_name=? where id=?";
时间: 2024-05-19 09:14:26 浏览: 151
sql一个字段中的某几个字update
4星 · 用户满意度95%
This is a SQL statement that updates the name of an actor in a database table called "actor". The statement uses two placeholders indicated by the question marks:
1. The first placeholder is for the new name of the actor and will be replaced with a value when the statement is executed.
2. The second placeholder is for the ID of the actor whose name will be updated and will also be replaced with a value when the statement is executed.
The statement is dynamic because it can be used to update any actor's name by passing in the appropriate values for the placeholders.
阅读全文