从 "actor" 表中选取 "FirstName" 列的SQL语句是（ ）。
A: select actor.FirstName
B: extract FirstName from actor
C: select FirstName from actor
D: update FirstName from actor
A: select actor.FirstName
B: extract FirstName from actor
C: select FirstName from actor
D: update FirstName from actor
举一反三
- 从"actor"表中选取"FirstName"列的SQL语句是()。 A: select actor.FirstName B: select FirstName from actor C: extract FirstName from actor D: update FirstName from actor
- 通过 SQL，根据 "FirstName" 列降序地从 "Actor" 表返回所有记录的正确表述是（）。 A: SELECT * FROM Actor SORT 'FirstName' DESC B: SELECT * FROM Actor ORDER BY FirstName DESC C: SELECT * FROM Actor ORDER FirstName DESC D: SELECT * FROM Actor SORT BY 'FirstName' DESC
- 通过 SQL，从 “actor” 表中选取 "FirstName" 列的值等于"John" 的所有记录的表述正确的是（ ）。? SELECT * FROM Actor WHERE FirstName='John'|SELECT * FROM Actor WHERE FirstName LIKE 'John'|SELECT [all] FROM Actor WHERE FirstName='John'|SELECT [all] FROM Actor WHERE FirstName LIKE 'John'
- 通过 SQL，从 "Actor" 表中选取 "FirstName" 列的值以 "a" 开头的所有记录的表述正确的是（ ）。 A: SELECT * FROM Actor WHERE FirstName='%a%' B: SELECT * FROM Actor WHERE FirstName='a' C: SELECT * FROM Actor WHERE FirstName LIKE '%a' D: SELECT * FROM Actor WHERE FirstName LIKE 'a%'
- 通过 SQL，根据 "FirstName" 列降序地从 "Actor" 表返回所有记录的正确表述是 A: SELECT * FROM Actor SORT BY 'FirstName' DESC B: SELECT * FROM Actor ORDER FirstName DESC C: SELECT * FROM Actor SORT 'FirstName' DESC D: SELECT * FROM Actor ORDER BY FirstName DESC