Archive destination /export/home/oracle/base10202/product/10.2.0.2/dbs/arch Oldest online log sequence 774 Current log sequence 775 SQL> alter database datafile 6 offline drop; --- we have to offline drop a dat
DROP INDEX index_name ON table_name Syntax for MS SQL Server: MS SQL Server的语法是这样: DROP INDEX table_name.index_name Syntax for IBM DB2 and Oracle: IBM DB2和Oracle的语法为: DROP INDEX index_name Syntax for MySQL: MySql则是这样: ALTER TABLE table_name DROP INDEX index_name --- D...
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1 CREATE DATABASE 句法 2 3 CREATE DATABASE [IF NOT EXISTS] db_name 4 5 CREATE DATABASE 以给定名字创建一个数据库。允许的数据库名规则在章节 6.1.2 数据库、表、索引、列和别名 中被给出。 如果数据库已经存在,并且你...
postgresql 强制执行drop语句 plsql执行spool Oracle数据导出spool用法详解 spool可导出select查询的结果集 以emp表为例 spool命令参数 spool可导出select查询的结果集 在实际的工作中,很多时候我们需要将Oracle中查询的数据导出来,生成excel格式的表以便于处理。虽然plsql可以导数据,但是只能手动不太方便,今天讲一下利用...
Oracle SQL: the Essential Reference by David C. Kreines Buy on Amazon CREATE/DROP SYNONYM CREATE [PUBLIC] SYNONYMsynonym_nameFOR [schema.]object_name[@dblink] Creates a public or private synonym for a database object. DROP [PUBLIC] SYNONYM [schema.]synonym_name ...
Drop历史INTERVAL分区PLSQL范例 --本范例是先drop相关分区,再一次性并行重建不可用的索引 setserveroutputon;DECLAREdtDATE; l_keep_days NUMBER :=6;--保留时间l_table_name VARCHAR2(200) :='QM20220114';--要清理的表名BEGIN--1. 先drop 分区,不重建索引dbms_output.put_line('1.先drop分区,不重建索引...
SQL> create user jeanron identified by jeanron; User created. SQL> drop user jeanron; User dropped. ###可以看到删除是不需要cascade选项的。如果想加cascade选项,会不会有问题呢。SQL> create user jeanron identified by jeanron; User created. SQL> drop user jeanron cascade; User dropped. ###...
SQL> / insert into emp select * from emp * ERROR at line 1: ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1' SQL> 2.kill会话,自动回滚 3.另起一个会话,产生大量的事务,消耗undo。发现offline中的extent被使用
SQL> drop table t; drop table t * ERROR at line 1: ORA-02449: unique/primary keys in table referenced by foreign keys (违反了constraint,员工销售表t1有參照到table t,这个reference relation不允许你drop table t) SQL> drop table t cascade constraints; ...