文章分类 -  SQL

proc SQL 中的exists
摘要：proc sql; title1 'Frequent Flyers Who Are Employees'; select count(name) from Sasuser1.Frequentflyers where exists ( select catx(", ", lastname, first 阅读全文
posted @ 2020-01-10 15:27 虾米WD 阅读(91) 评论(0) 推荐(0)