sql limit子句_SQL子句解释的位置：之间，之间，类似和其他示例

sql limit子句

什么是SQL Where子句？ (What is a SQL Where Clause?)

`WHERE`子句(和/或`IN` ， `BETWEEN`和`LIKE` ) (The `WHERE` Clause (and/or, `IN` , `BETWEEN` , and `LIKE` ))

The WHERE clause is used to limit the number of rows returned.

WHERE子句用于限制返回的行数。

In this case all five of these will be used is a some what ridiculous WHERE clause.

在这种情况下，将使用所有这五个荒谬的WHERE子句。

Here is the current full student list to compare to the WHERE clause result set:

这是当前的完整学生列表，可与WHERE子句结果集进行比较：

select studentID, FullName, sat_score, rcd_updated from student;

+-----------+------------------------+-----------+---------------------+
| studentID | FullName               | sat_score | rcd_updated         |
+-----------+------------------------+-----------+---------------------+
|         1 | Monique Davis          |       400 | 2017-08-16 15:34:50 |
|         2 | Teri Gutierrez         |       800 | 2017-08-16 15:34:50 |
|         3 | Spencer Pautier        |      1000 | 2017-08-16 15:34:50 |
|         4 | Louis Ramsey           |      1200 | 2017-08-16 15:34:50 |
|         5 | Alvin Greene           |      1200 | 2017-08-16 15:34:50 |
|         6 | Sophie Freeman         |      1200 | 2017-08-16 15:34:50 |
|         7 | Edgar Frank "Ted" Codd |      2400 | 2017-08-16 15:35:33 |
|         8 | Donald D. Chamberlin   |      2400 | 2017-08-16 15:35:33 |
|         9 | Raymond F. Boyce       |      2400 | 2017-08-16 15:35:33 |
+-----------+------------------------+-----------+---------------------+
9 rows in set (0.00 sec)

Rows will be presented that…

将显示以下行：

WHERE Student IDs are between 1 and 5 (inclusive)
WHERE学生ID是1和5(含)之间
OR studentID = 8
OR学生ID = 8

Here’s an updated query, where any record that has an SAT score that’s in this list (1000, 1400) will not be presented:

这是一个更新的查询，其中不会显示此列表中(1000，1400)具有SAT分数的任何记录：

select  studentID, FullName, sat_score, recordUpdated
from    student
where   (studentID between 1 and 5 or studentID = 8)andsat_score NOT in (1000, 1400);

+-----------+----------------------+-----------+---------------------+
| studentID | FullName             | sat_score | rcd_updated         |
+-----------+----------------------+-----------+---------------------+
|         1 | Monique Davis        |       400 | 2017-08-16 15:34:50 |
|         2 | Teri Gutierrez       |       800 | 2017-08-16 15:34:50 |
|         4 | Louis Ramsey         |      1200 | 2017-08-16 15:34:50 |
|         5 | Alvin Greene         |      1200 | 2017-08-16 15:34:50 |
|         8 | Donald D. Chamberlin |      2400 | 2017-08-16 15:35:33 |
+-----------+----------------------+-----------+---------------------+
5 rows in set (0.00 sec)

*As with all of these SQL things there is MUCH MORE to them than what’s in this introductory guide.

*与所有这些SQL事物一样，它们比本入门指南中的内容要多得多。

I hope this at least gives you enough to get started.

我希望这至少能给您足够的入门。

Please see the manual for your database manager and have fun trying different options yourself.

请参阅数据库管理员的手册，并尝试自己尝试其他选项，这很有趣。