如何使用SQL从名为Persons的表中查询FirstName列的值以"a"开头的所有记录?( )
SELECT * FROM Persons WHERE FirstName='%a%'
SELECT * FROM Persons WHERE FirstName LIKE '%a'
SELECT * FROM Persons WHERE FirstName='a'
SELECT * FROM Persons WHERE FirstName LIKE 'a%'
如何使用SQL从名为Persons的表中查询FirstName列的值以"a"开头的所有记录?( )
SELECT * FROM Persons WHERE FirstName='%a%'
SELECT * FROM Persons WHERE FirstName LIKE '%a'
SELECT * FROM Persons WHERE FirstName='a'
SELECT * FROM Persons WHERE FirstName LIKE 'a%'