If the index of the current letter is equal to the length of the string, this variable is an empty string.
如果当前字母的下标和字符串的长度相等,那么这个变量是一个空字符串。
2
Length of a stringvariable: Input argument for the SUBSTR function, which determines the desired length of the resulting string or output of the length function.
字符串变量的长度:substr函数的输入参数,决定了结果字符串的期望长度或length函数的输出。
3
The DB2_CLPPROMPT registry variable can be set to any text string up to a maximum of 100 characters in length.