``` 2、在SELECT语句后面添加FETCH FIRST子句,并指定要检索的行数。在这种情况下,我们要查询前10条记录,所以将其设置为10。完整的SQL查询如下: ```sql SELECT * FROM employees FETCH FIRST 10 ROWS ONLY; ``` 通过执行以上SQL语句,您将从 `employees` 表中获取前10条记录。这是在DB2数据库中一种检索前几...
(select distinct id from mynumber fetch first 10 rows only) select * from (select id,name,RANK() over ( order by id ) case1,DENSE_RANK() over ( order by id ) case2,row_number() over ( order by id ) case3 from mynumber) as tt where case1<=10 select * from (select id,nam...
1、列出表中前10条数据—fetch first 10 rows only 例如:select * from <表名> fetch first 10 rows only 2、对是null的字段进行值转换—coalesce(字段名,转换后的值) 例如:select coalesce(id,1) from <表名>-对表中id如果为null转换成1 3、计算出日期中是周几(1是周日…7是周六)—dayofweek(日期) ...
db2 => select istop from news where id =370 fetch first 10 rows only db2修改字段长度 db2 alter table db2admin.config alter cvalue set data type varchar(255) db2 => alter table news alter AUTHOR set data type varchar(250) DB20000I SQL 命令成功完成。 db2 => describe table news db2增加...
各种数据库取前⼗⾏的⽅式不⽌⼀种，这⾥只提供个⼈较喜欢使⽤的⽅式 MySQL查询前⼗⾏：SELECT t.* FROM TABLENAME t limit 10;DB2查询前⼗⾏：SELECT t.* FROM TABLENAME t fetch first 10 rows only;Oracle查询前⼗⾏：SELECT t.* FROM TABLENAME t WHERE ROWNUM <= 10;
15、fetch first 10 rows only --列出表中前10条数据 例如:select * from <表名> fetch first 10 rows only 16、coalesce(字段名,转换后的值) --对是null的字段进行值转换 例如:select coalesce(id,1) from <表名> --对表中id如果为null转换成1 ...
delete from (select * from t fetch first 10 rows only)或 delete from t where id in (select id from t fetch first 10 rows only)
Select stmt_text ,(stop_time-start_time) from stmt_ monitor_name Where stmt_operation not in (7,8,9,19) order by decimal(stop_time-start_time) desc fetch first 10 rows only 1.6.2查看按照顺序降序排列执行次数最多的SQL Select distinct(stmt_text),count(*) Count from stmt_monitor_name Wh...
-- Frank values ( X'30' ) -- 0 values ( X'30313233' ) -- 0123 -- now let's get names with a digit 8 in them: select name from siebel.s_org_ext where name like '%' || X'38' || '%' fetch first 10 rows only
DB2 不支持 Limit 语法，想查询前多少条，可以使用如下语句：