ex2-5.sql

来自「数据库系统练习答案」· SQL 代码 · 共 5 行

SQL
5
字号
select "phonenumber"
from "member"
where "memno" in (select "borrowermemno"
		  from "book" NATURAL JOIN "author"
		  where "lname" = 'Tanenbaum')

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