sap定义表时键字的位置

在sap中定义表的时候，设置为键字字段一定要出现在表的开头部分，并且连续出现，

否则就会报错：“关键字已定义; 字段 XXXX 可能不在关键字中”。

Diagnosis

When defining table fields, you added further key fields at the end after entering a block of key fields followed by a block of non-key fields.
All the key fields of a table must be in a block at the beginning of the table.
Procedure

All key fields in a table should be entered in a single block.
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