要从特定列中获取记录,请使用以下语法。只需选择您想要记录的特定列-
select yourColumnName from yourTableName;
让我们首先创建一个表-
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Score int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable(Score) values(89); mysql> insert into DemoTable(Score) values(99); mysql> insert into DemoTable(Score) values(78); mysql> insert into DemoTable(Score) values(75);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
这将产生以下输出-
+----+-------+ | Id | Score | +----+-------+ | 1 | 89 | | 2 | 99 | | 3 | 78 | | 4 | 75 | +----+-------+ 4 rows in set (0.00 sec)
以下是从特定列中选择所有记录的查询-
mysql> select Score from DemoTable;
这将产生以下输出-
+-------+ | Score | +-------+ | 89 | | 99 | | 78 | | 75 | +-------+ 4 rows in set (0.00 sec)