If you don't know immediately what your SQL Query formula is going to be, enter double-quotes into the formula box.
如果不能立即知道SQL查询公式是什么,那么在公式框中输入双引号。
Then choose the selection condition of By SQL Query, and enter as the formula (see figure 8).
然后选择selection condition为By SQL Query,并输入“ ”作为公式(参见图8)。
Note that the SQL Query that you enter is a formula that evaluates to an SQL Query.
注意输入的SQL查询是一个SQL查询公式。
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