command length 中文意思是什麼
command length
解釋
指令長度-
The options in command mode are broad and varied, and they are the subject of a number of book - length texts
在命令模態的選擇項是寬廣又不同的,而且他們是一些書長文本的主題。 -
If you want to add a field called personid of type integer, which should not be null, and a field name of type character with a length of 42, which could be null, then the sql command would be
如果要添加名為personid和name的欄位,前者的欄位類型為integer ,並且不應該為null ,後者的欄位類型為character , length為42 ,並且可以為null ,那麼, sql命令將如下所示:
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