```sql SELECT * FROM employees; ``` 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...
db2取前十条记录 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 t...
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 case2 between 5 and 10 (3)取前10条记录 select id from mynumber fetch first 10 rows only select *...
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;
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...
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)
(1) 取前10条差别id记实,假若最后1笔记实的ID依旧有相同的,那么全部取出来。 select * from mynumber where id in (select distinct id from mynumber fetch first 10 rows only) select * from (select id,name,RANK() over ( order by id ) case1,DENSE_RANK() ...
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 17、dayofweek(日期) --计算出日期中是周几(1是周日,2是周一...7是周六) dayofweek...
DB2中请使用 select * from A fetch first 10 rows only
FETCH FIRST fetch_rows ROWS ONLY; ``` 其中,`table_name`是要查询的表名,`column_name`是用于排序的列名,`start_row`是要开始的行数,`fetch_rows`是要获取的行数。 例如,要获取第11行到第20行的数据,可以使用以下语句: ``` SELECT * FROM table_name ORDER BY column_name OFFSET 10 ROWS FETCH FI...