就这些重点语句，我要求大家有仅了解字面，还要注意字里行间的深意。
About the key sentences, I ask you to study not only the meaning of the words, but also in the line.
需要注意的一个重点是在sql语句中使用以冒号界定的替换操作符。
One important thing to note is the use of the colon delimited replacement operators in the SQL statements.
重点：SQL查询公式的选择语句必须包括视图列中引用的全部字段。
Important: the Select statement of the SQL Query formula must include all the fields referenced in the view's columns.
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