select * from user_sequences 1. 2、创建 创建序列需要CREATE SEQUENCE系统权限。序列的创建语法如下: CREATE SEQUENCE 序列名 [INCREMENT BY n] [START WITH n] [{MAXVALUE/ MINVALUE n| NOMAXVALUE}] [{CYCLE|NOCYCLE}] [{CACHE n| NOCACHE}]; 其中: INCREMENT BY用于定义序列的步长,如果省略,则默认...
在Oracle数据库中,可以通过以下SQL语句来查看数据库中的序列: ="hljs">="hljs-keyword">SELECTsequence_name ="hljs-keyword">FROMuser_sequences; 该查询将返回当前用户下所有的序列名称。如果想要查看所有用户的序列,可以使用以下SQL语句: ="hljs">="hljs-keyword">SELECTsequence_name ="hljs-keyword">FRO...
SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segments where segment_name=upper('&index_name'); 4 序列号 1、 查看序列号,last_number是当前值 SQL>select * from user_sequences; 四、查看视图 1、 查看视图的名称 SQL>select view_name from user_views; 2、 查看创建视图的select...
setodps.sql.allow.fullscan=true;selectregion,max(total_price)fromsale_detailwheretotal_price>100groupbyregionhavingsum(total_price)>300.5orderbyregion limit5;--按照执行顺序书写。与上一写法等效。fromsale_detailwheretotal_price>100groupbyregionhavingsum(total_price)>300.5selectregion,max(total_price)orde...
3、删除指定sequence: [sql] view plain...copy DROP SEQUENCE SEQ_ON_USER; 4、查看指定sequence的当前值:两种方式: [sql] view plain copy select last_number... from user_sequences wheresequence_name='SEQ_ON_USER'; [sql] view plain copy select SEQ_ON_USER....
grant resource ,connect to user; resource: create trigger create sequence create type create procedure create cluster create operator create indextype create table connect: create session 4.切换用户: conn username/password 5.导入测试数据: 因为数据文件的默认语言环境为英语,当前windows系统是中文,中英文时...
select 'grant select on ' || sequence_name || ' to b;' from dba_sequences where sequence_owner='A'; 2.4、--Oracle查询用户视图 select * from user_views; 2.5、a用户下授权查询视图给test11用户 select 'grant select on a.' || view_name || ' to test11;' from user_views 备注:授权更...
The output of the START WITH statement is returned level by level. However, there is no sequence guarantee at each level because the database automatically selects the optimal execution path during each round of query. In the preceding example, A is output first, but the sequence of B, C,...
if sCount = 0then executeimmediate'create unique index uk_ppos_notice_relateinfo_idxl on ppos_notice_relateinfo (NOTICE_ID,USER_ID) tablespace HS_SYSTEM_IDX'; endif; selectcount(*)intosCountfromuser_sequences uswhereus.sequence_name =upper('SEQ_ppos_notice_relateinfo'); ...
1一个 SQL 语句中的 select_expression 或 where_definition 可由任何使用了下面所描述函数的表达式组成。23包含NULL的表达式总是得出一个NULL值结果,除非表达式中的操作和函数在文档中有另外的说明。45注意:在一个函数名和跟随它的括号之间必须不存在空格。这有助于 MySQL 语法分析程序区分函数调用和对恰巧与函数同名...