在给出的SQL语句中,开发者试图通过`SELECT MAX(RE_DATE) INTO V_RE_DATE FROM T_RECORDING WHERE ID ='100010010102'`来获取`T_RECORDING`表中ID为`100010010102`记录的`RE_DATE`字段的最大值,并将其赋值给变量`V_...
WHERE s.id IN (SELECT sc.student_id FROM SC sc GROUP BY sc.student_id HAVING COUNT(DISTINCT sc.course_id) = (SELECT COUNT(*) FROM C)); ``` 查询选修了至少 5 门以上的课程的学生: ```sql SELECT s....
create table test_temp as select * from test_0210 where id in (select max(id) from test_0210 group by name); truncate table test_0210; insert into test_0210 select * from test_temp; ``` 这种方法的优点...
where round(DISK_READS/EXECUTIONS) > (select max(round((DISK_READS/EXECUTIONS)/5)) from v$sqlarea where EXECUTIONS > 0) and EXECUTIONS > 0 and DISK_READS > 100 order by 1; -- 监控高行处理量SQL select...
SELECT MAX(user_id) INTO p_max_id FROM users; END get_max_user_id; / ``` 3. **调用存储过程**: 在VB中,我们需要创建一个OracleCommand对象,设置其CommandType为StoredProcedure,并指定存储过程的名称。...
select max(id) from ( select top (@page-1)*@pagesize id from tablename order by id ) as t ) order by id; ``` 新版本的SQL Server可以使用`OFFSET/FETCH`来简化分页: ```sql select * from ...
SELECT Id FROM jk_upczyd_max GROUP BY Id HAVING COUNT(Id) > 1 ) ``` 一旦找到重复的数据,可以使用`DELETE`语句删除这些记录,例如: ```sql DELETE FROM JK_ITEM_REC WHERE Id IN ( SELECT Id FROM JK_ITEM...
where a.id in (select max(b.id) from bookEnrol b group by b.bookid) and a.state = 1 and a.bookid = k.id; ``` 这条查询语句与方案一相似,但是它通过选取`bookEnrol`表中最大ID的记录来确定最近的借阅记录...
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在给出的SQL语句中,开发者试图通过`SELECT MAX(RE_DATE) INTO V_RE_DATE FROM T_RECORDING WHERE ID ='100010010102'`来获取`T_RECORDING`表中ID为`100010010102`记录的`RE_DATE`字段的最大值,并将其赋值给变量`V_...
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where a.id in (select max(b.id) from bookEnrol b group by b.bookid) and a.state = 1 and a.bookid = k.id; ``` 这条查询语句与方案一相似,但是它通过选取`bookEnrol`表中最大ID的记录来确定最近的借阅记录...