substr

The substr function returns a part of a string.

函数地作用是：返回子字符串可以。

SUBSTR calculates lengths using characters as defined by the input character set.

和substr差不错，不过就是在计算偏移量的时候，有差异，substr是以字符为单位。

This explains the use of substr (text, match [0], match [1]) in the last line of code.

这解释了最后一行代码中substr (text, match [0]，match[1])的使用。

Mask column 3 by entering the following in the field that contains COL3: SUBSTR (COL3, 1, 5).

通过在包含COL3的字段中输入下面的内容可以屏蔽列3：substr (COL3, 1,5)。

Functions like SUBSTR and LENGTH work with characters when called in conjunction with UCS-2 data types.

当用ucs - 2数据类型调用时，SUBSTR和LENGTH等函数处理字符。