可以使用NOT IN来实现这个目标: SELECT*FROMstudentsWHEREageNOTIN(20,22); 1. 2. 3. 在上面的示例中,NOT IN后的括号中包含要排除的年龄值,即20和22。查询结果将返回年龄不在这两个值范围内的学生信息。 注意,在使用NOT IN时需要注意以下几点: NOT IN可以用于任何数据类型的列,包括数字、字符和日期等。 ...
一、分别执行以下语句,主键索引(id)和普通索引(name),在 in , not in 下是否走索引。 explain select * from t1 where id in (select id from t2); --1 explain select * from t1 where name in (select name from t2); --2 explain select * from t1 where id not in (select id from t2); ...
WHERE column IN (value1,value2,...) WHERE column NOT IN (value1,value2,...) 1、in 后面是记录集,如: select * from table where uname in(select uname from user); 例子: SELECT * FROM article WHERE uid IN(SELECT uid FROM user WHERE status=0) 在这个 SQL 例子里,我们实现了查出所有状...
上一节的 WHERE 查询操作都是单条件的,如果想要实现多条件,则可以使用下面几种逻辑语句: AND OR IN NOT 1、AND AND 、OR 这种语句跟其他的计算机语言的使用是一样的,这里就简单的写几个例子。 AND 与逻辑,必须同时满足 要选出 ID 值小于100 同时大于2的数据,这是一个 与 句式,就使用 AND 来进行连接。
SELECT prod_id, prod_price, prod_name FROM products WHERE vend_id = 1003 AND prod_price = 10; #优先处理AND操作符SELECT prod_id, prod_price, prod_name FROM pr
或select name, gender, age, Title of TV Seriesuniversity, dynastygpa from user_profile where Title of TV Series in('甄嬛传','苍兰决','武林外传'); 或select name, gender, age, Title of TV Seriesuniversity, dynastygpa from user_profile where Title of TV Series NOTIN('铁齿铜牙纪晓岚','...
create procedureinsert_emp(instartint(10),inmax_numint(10))begin declare i intdefault0;setautocommit=0;repeatseti=i+1;insert intoEMPvalues((start+i),rand_string(6),'SALESMAN',0001,curdate(),2000,400,rand_num());until i=max_num ...
mark) FROM student,result WHERE student.s_no=result.s_no GROUP BY student.s_no > 1055 - Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'db_ketest.student.s_name' which is not functionally dependent on columns in GROUP BY clause; this is ...
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mysql怎样使用in查询 一、基础用法 mysql中in常用于where表达式中,其作用是查询某个范围内的数据。 select * from where field in (value1,value2,value3,…) 当IN 前面加上 NOT 运算符时,表示与 IN 相反的意思,即不在这些列表项内选择 select * from where field not in (value1,value2,value3,…) ...