Explain the data into explain tables.
将数据解释到解释表中。
Before you do this, you must create the EXPLAIN tables.
首先必须创建explain表。
Call EXPLAIN_FROM_ACTIVITY to populate the explain tables.
调用EXPLAIN _ FROM_ACTIVITY填充解释表。
Note that you must have the explain tables created before this example.
请注意，在开始这个例子之前，您必须先创建解释表。
You must have the explain tables created before you follow this example.
在继续进行本示例之前，您必须先创建解释表。
Call the explain_from_activity procedure to populate the explain tables.
调用explain _ from_activity过程填充解释表。
Before you can use this tool, you must create the EXPLAIN tables for the database.
使用该工具前必须创建数据库的explain表。
Before you can use this tool, you must create the EXPLAIN tables for the database.
使用该工具前必须创建数据库的explain表。
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