SELECT * FROM t_student HAVING SUM(math + chinese + english) > 240;
时间: 2024-06-06 22:10:46 浏览: 22
As an AI language model, I cannot access the database to execute this query. However, I can explain the query.
This query selects all columns from the table t_student where the sum of the math, chinese, and english scores is greater than 240. The HAVING clause is used to filter the rows based on the result of an aggregate function, in this case, the SUM function.
相关问题
D:\>sqlite3 mydb.db create table t_student(sid INTEGER primary key,sname varchar(20)); insert into t_student(sid,sname)values(1,'coolsy'); select * from t_student; select sid,sname from t_student; insert into t_student(sid,sname)values(2,'Tom'); insert into t_student(sid,sname)values(3,'Rose'); insert into t_student(sid,sname)values(4,'Eva'); select * from t_student; update t_student set sname='Kuka' where sid=1; select * from t_student; delete from t_student where sid=4; select * from t_student; select * from t_student order by sid desc; select * from t_student order by sid asc; select sname from t_student where sid between 1 and 2;
这是一段SQLite命令行操作数据库的代码。它创建了一个名为"mydb.db"的数据库,其中有一个名为"t_student"的表格,表格有两列,分别是"sid"和"sname"。接着向表格中插入了一条记录,然后通过"select"语句查询表格中所有记录,再查询指定列的记录。接下来又插入了三条记录,并查询整个表格,更新了id为1的记录中"sname"列的值,再查询整个表格,删除了id为4的记录,再查询整个表格。最后进行了一些排序和条件查询。
select * from t_student where sno='0004'and score<60 other by score desc;是表示什么呢
SQL 查询语句 "SELECT * FROM t_student WHERE sno='0004' AND score<60 ORDER BY score DESC;" 表示查询 t_student 表中学号为 "0004" 且分数小于 60 的学生信息,并按照分数降序排列。
该查询语句使用了 WHERE 子句来设置条件,即 sno='0004' 表示学生学号为 "0004",而 score<60 表示分数小于 60。通过这两个条件的组合,可以筛选出符合条件的学生。
另外,该语句还使用了 ORDER BY 子句来按照 score 字段的值进行降序排列,关键字 DESC 表示降序排列(默认是升序,使用 ASC 表示升序)。
最终,查询结果将返回满足条件的学生信息,并按照分数的降序排列。使用 "*" 表示选择返回所有字段信息。