返回平面文件db中的记录（行）数？ [英] return the number of records (rows) in a flat file db?
问题描述
我想在平面文件db中返回记录（行）的数量。
我的脚本是资源工具包库，每个项目都有一个目录号（$ catnumber），而不是用户必须记住在添加记录时要输入的下一个目录号，我希望能够向他们显示下一个号码，或者将其作为表格中字段的值。
我只需要知道如何将数据库中的记录总数（行数？）作为数字返回（加上1 ......这将是他们的下一个目录（$ catnumber）数字）
是否与rec_count有关？
我试过：
open（DB，"< / full / path / db / db.txt"）|| die无法打开full / path / db / db.txt：$！" ;;
while（< DB>）{
（$ catnumber）= split （"，"）;
}
但我得到的是他们输入的最后记录的价值（$ catnumber）。
感谢
I am wanting to return the number of records (rows) in a flat file db.
My script is a resource kit library and each item has a catalog number ($catnumber), instead of the user having to remember the next catalog number to enter as they add a record, I want to be able to either show them the next number or have it as a value in a field on the form.
I just need to know how to return the total number of records (rows?) in the db as a number (plus 1..that would be their next catalog ($catnumber) number)
is it something to do with rec_count?
I tried:
open (DB, "< /full/path/db/db.txt") || die "cannot open full/path/db/db.txt: $!";
while (<DB>) {
($catnumber) = split(",");
}
But what I got was the value ($catnumber) of the LAST record they entered.
thanks
推荐答案
catnumber），而不是用户必须记住下一个目录号码，因为他们添加记录，我希望能够要么向他们显示下一个数字，要么将其作为表格中字段的值。
我只需要知道如何返回记录总数（行？） db作为一个数字（加上1 ..这将是他们的下一个目录（
catnumber), instead of the user having to remember the next catalog number to enter as they add a record, I want to be able to either show them the next number or have it as a value in a field on the form.
I just need to know how to return the total number of records (rows?) in the db as a number (plus 1..that would be their next catalog (
catnumber）号码）
是否与它有关rec_count？
我试过：
open（DB，"< /full/path/db/db.txt"）|| die无法打开full / path / db / db.txt：
catnumber) number)
is it something to do with rec_count?
I tried:
open (DB, "< /full/path/db/db.txt") || die "cannot open full/path/db/db.txt:
！" ;;
while（< DB>）{
（
!";
while (<DB>) {
(
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