§ SQL兼容性 - LENGTHB()函数
§ 1. 语法
LENGTHB(string)
1
§ 2. 定义和用法
LENGTHB()
函数相当于内建LENGTH()
函数的别名,会传回储存string
所需的字节数。
§ 3. 示例
-- 注意,这里把 -123 和 123.5555 当做字符串类型
greatsql> SELECT LENGTHB(-123), LENGTHB(123.5555);
+---------------+-------------------+
| LENGTHB(-123) | LENGTHB(123.5555) |
+---------------+-------------------+
| 4 | 8 |
+---------------+-------------------+
greatsql> SELECT LENGTHB(DATE '2023-05-26');
+----------------------------+
| LENGTHB(DATE '2023-05-26') |
+----------------------------+
| 10 |
+----------------------------+
greatsql> SELECT LENGTHB(1.2E+9),1.2E+9;
+-----------------+------------+
| LENGTHB(1.2E+9) | 1.2E+9 |
+-----------------+------------+
| 10 | 1200000000 |
+-----------------+------------+
greatsql> SELECT LENGTHB( _UTF8MB4 'GreatSQL数据库');
+----------------------------------------+
| LENGTHB( _UTF8MB4 'GreatSQL数据库') |
+----------------------------------------+
| 17 |
+----------------------------------------+
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
§ 问题反馈
§ 联系我们
扫码关注微信公众号