1.top子句 规定返回记录的数目:
MySQL:SELECT column_name(s) FROM table_name LIMIT number;
Oracle:SELECT column_name(s) FROM table_name WHERE ROWNUM <= number
2.通配符
like 通配符
SELECT * FROM Persons WHERE City NOT LIKE '%lon%';
_通配符
从"Persons" 表中选取的这条记录的姓氏以"C" 开头,然后是一个任意字符,然后是"r",然后是任意字符,然后是"er":
SELECT * FROM Persons WHERE LastName LIKE 'C_r_er'
[charlist] 通配符
从上面的"Persons" 表中选取居住的城市不以"A" 或"L" 或"N" 开头的人:
SELECT * FROM Persons WHERE City LIKE '[!ALN]%'
3.操作符
in between as