There are two ways to delete rows in a table using information contained in other tables in the database: using sub-selects, or specifying additional tables in theUSINGclause. Which technique is more appropriate depends on the specific circumstances. You must have theDELETEprivilege on the table...
SQL> select table_name,partition_name from user_tab_partitions where table_name='PDBA'; TABLE_NAME PARTITION_NAME --- --- PDBA P1 PDBA P2 PDBA P3 PDBA P4 sql> select count(*) from pdba partition (p1); count(*)---1718285sql> select count(*) from pdba partition (p2); count(...
在以上信息中,表名都是被重命名过的,字段table_name或者object_name就是删除后在回收站中的存放表名 *如果还能记住表名,则可以用下面语句直接恢复: flashback table 原表名 to before drop 如果记不住了,也可以直接使用回收站的表名进行恢复,然后再重命名,参照以下语句: flashback table "回收站中的表名(如:...
delete from [表名] where [该行特征]; <br/>delete from [表名];--删空整个表 删除表中某行数据 create table ([字段名1] [类型1] ;,[字段名2] [类型2],...<,primary key (字段名m,字段名n,...)>;) 创建表 SQL 语句 (SELECT * FROM "table1";) 可以执行 SQL 语句 参考资料 https:...
[ ON DELETE action ] [ ON UPDATE action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] table_constraint 可以是以下选项之一: [ CONSTRAINT constraint_name ] { UNIQUE ( column_name [, ... ] ) [ USING INDEX TABLESPACE tablespace ] | ...
PostgreSQL drop table 空间不释放的问题解决 先上结论:有连接占用这个表(会话没提交),kill掉相关连接即可释放出磁盘空间。 背景: 1、生产环境,因为历史原因某个日志表体积超过150GB,经与研发沟通后,确定处理策略是保留3个月的数据即可,其余历史数据可丢弃。
GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER } [,...] | ALL [ PRIVILEGES ] } ON [ TABLE ] table_name [, ...] TO { username | GROUP group_name | PUBLIC } [, ...] [ WITH GRANT OPTION ] GRANT { { CREATE | TEMPORARY | TEMP } [,...] |...
*重命名一个表: alter table [表名A] rename to [表名B]; *删除一个表: drop table [表名]; [表内基本操作]=== *在已有的表里添加字段: alter table [表名] add column [字段名] [类型]; *删除表中的字段: alter table [表名] drop column [字段名]; *重命名一个字段: ...
UPDATE、DELETE和INSERT命令在目标表上会获得一个这种模式的锁。(加上在任何其他被引用表上的 ACCESS SHARE锁。)通常,这种锁模式将被任何修改表中数据的命令取得。 SHARE UPDATE EXCLUSIVE 共享更新独占 VACUUM(不带FULL)、ANALYZE、CREATE INDEX CONCURRENTLY、REINDEX CONCURRENTLY、CREATE STATISTICS命令以及某些ALTER INDEX...