如果您不想看到表中的整个行，只需用逗号分隔命名您感兴趣的列。例如，如果您想知道动物何时出生，请选择name和 birth列：
mysql> SELECT name, birth FROM pet;
+----------+------------+
| name | birth |
+----------+------------+
| Fluffy | 1993-02-04 |
| Claws | 1994-03-17 |
| Buffy | 1989-05-13 |
| Fang | 1990-08-27 |
| Bowser | 1989-08-31 |
| Chirpy | 1998-09-11 |
| Whistler | 1997-12-09 |
| Slim | 1996-04-29 |
| Puffball | 1999-03-30 |
+----------+------------+要查找谁拥有宠物，请使用以下查询：
mysql> SELECT owner FROM pet;
+--------+
| owner |
+--------+
| Harold |
| Gwen |
| Harold |
| Benny |
| Diane |
| Gwen |
| Gwen |
| Benny |
| Diane |
+--------+请注意，该查询只是owner从每个记录中检索该 列，并且其中一些出现多次。为了最大程度地减少输出，只需添加关键字一次即可检索每个唯一的输出记录 DISTINCT：
mysql> SELECT DISTINCT owner FROM pet;
+--------+
| owner |
+--------+
| Benny |
| Diane |
| Gwen |
| Harold |
+--------+您可以使用WHERE子句将行选择与列选择结合起来。例如，要仅获取狗和猫的出生日期，请使用以下查询：
mysql> SELECT name, species, birth FROM pet
WHERE species = ‘dog‘ OR species = ‘cat‘;
+--------+---------+------------+
| name | species | birth |
+--------+---------+------------+
| Fluffy | cat | 1993-02-04 |
| Claws | cat | 1994-03-17 |
| Buffy | dog | 1989-05-13 |
| Fang | dog | 1990-08-27 |
| Bowser | dog | 1989-08-31 |
+--------+---------+------------+原文：https://www.cnblogs.com/owlin/p/13730785.html