copy to 09cz for allt(dm)="01"在VFP里什么意思

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copy to 09cz for allt(dm)="01"在VFP里什么意思
copy to 09cz for allt(dm)="01"在VFP里什么意思

copy to 09cz for allt(dm)="01"在VFP里什么意思
将当前打开的表里面满足allt(dm)="01"条件的记录复制到09cz文件,allt(dm)="01"条件表示dm(代码)列的值去除前后空格后等开"01"的记录.

这样解释:把当前打开的表中的字段dm的值去掉前后空格后如果其值为"01"的拷贝到表09cz中,09cz为一个与当前表结构一样的新的表,就在当前的默认目录下
执行这句语句应有这样的前提:
1、当前有一打开的表
2、这个表有字段名为“dm”的字段...

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这样解释:把当前打开的表中的字段dm的值去掉前后空格后如果其值为"01"的拷贝到表09cz中,09cz为一个与当前表结构一样的新的表,就在当前的默认目录下
执行这句语句应有这样的前提:
1、当前有一打开的表
2、这个表有字段名为“dm”的字段

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copy to 09cz for allt(dm)="01"
意思是:在上面你打开的表中,查找满足字段dm的值,去掉所有空格之后等于字符01的记录,复制到表09cz中。

copy to 这个很好理解,就是把当前表中符合条件(for后)的值复制到09cz表中
for allt(dm)="01" 表示 将dm去前后空格后等于01的值(字符型)
dm 有可能是变量或者字段. 如果前面没有定义变量,就是字段.

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