📅 最后修改于: 2020-12-29 04:49:51 🧑 作者: Mango
MS SQL Server LIKE子句用于使用通配符运算符将值与相似值进行比较。有两个通配符与LIKE运算符一起使用-
百分号代表零个，一个或多个字符。下划线表示单个数字或字符。这些符号可以组合使用。
以下是％和_的基本语法。
SELECT *\column-list FROM table_name
WHERE column LIKE 'XXXX%'
or
SELECT *\column-list FROM table_name
WHERE column LIKE '%XXXX%'
or
SELECT *\column-list FROM table_name
WHERE column LIKE 'XXXX_'
or
SELECT *\column-list FROM table_name
WHERE column LIKE '_XXXX'
or
SELECT *\column-list FROM table_name
WHERE column LIKE '_XXXX_'
您可以使用AND或OR运算符组合N个条件。 XXXX可以是任何数字或字符串值。
以下是一些示例，这些示例显示WHERE部分具有不同的LIKE子句，并且带有’％’和’_’运算符。
| Sr.No | Statement & Description |
|---|---|
| 1 |
WHERE SALARY LIKE ‘200%’ Finds any values that start with 200 |
| 2 |
WHERE SALARY LIKE ‘%200%’ Finds any values that have 200 in any position |
| 3 |
WHERE SALARY LIKE ‘_00%’ Finds any values that have 00 in the second and third positions |
| 4 |
WHERE SALARY LIKE ‘2_%_%’ Finds any values that start with 2 and are at least 3 characters in length |
| 5 |
WHERE SALARY LIKE ‘%2’ Finds any values that end with 2 |
| 6 |
WHERE SALARY LIKE ‘_2%3’ Finds any values that have a 2 in the second position and end with a 3 |
| 7 |
WHERE SALARY LIKE ‘2___3’ Finds any values in a five-digit number that start with 2 and end with 3 |
考虑具有以下记录的CUSTOMERS表。
ID NAME AGE ADDRESS SALARY
1 Ramesh 32 Ahmedabad 2000.00
2 Khilan 25 Delhi 1500.00
3 kaushik 23 Kota 2000.00
4 Chaitali 25 Mumbai 6500.00
5 Hardik 27 Bhopal 8500.00
6 Komal 22 MP 4500.00
7 Muffy 24 Indore 10000.00
以下命令是一个示例，它将显示来自CUSTOMERS表的所有记录，其中SALARY以200开头。
SELECT * FROM CUSTOMERS
WHERE SALARY LIKE '200%';
上面的命令将产生以下输出。
ID NAME AGE ADDRESS SALARY
1 Ramesh 32 Ahmedabad 2000.00
3 kaushik 23 Kota 2000.00