我想从两个表中收集IN,合并这些表以使用IN语句来查找计数(*),如下所示: create function listing_countcount(*) from listing_category where category in(ARRAY1+ARRAY2)); end
是否可以设置并声明选定的结果(ARRAY1和ARRAY2)以便稍后使用</e
例如,One mysql server machine A has One table called "tableA" under in a database called databaseA, anothermysql server machine B has one table called "tableB" under in a database called databaseB.如何加入tableA
我有一个Spring Boot应用程序,在同一个MySQL DB实例中为2个模式配置了2个数据源。我可以分别查询这两个数据源,但问题是:如何在一个事务中同时查询这两个数据源?类似于此SQL的内容:
select a.systemid, c.name from (select systemid from DATATABLE.PROPERTY group by systemidhaving date_add(max(la
我有两个表,上面有数百万的数据。这两个表都有2个参数,我想通过它们来连接这些表。查询示例: bills.meter_id,FROM records bills.mnumberbills.end_date = records.enddateWHERE records.mnumber IS NOT NULL
AND records.endda