;selectTABLE_NAME,column_name,DATA_TYPE,data_lengthfromuser_tab_columnswhereTABLE_NAMEin...(table_name) nrowsfromuser_tables;selecttabname,cardfromsyscat.tableswheretabschema = '用户名' and 智能推荐 PL/SQL Developer如
Steps: === 1) Execute below query to find the constraint name: 执行下面的查询来找到约束名: SQL> select owner, constraint_name,table_name,index_owner,index_name from dba_constraints where (index_owner,index_name) in (select owner,index_name from dba_indexes where tablespace_name='<tablespace...
A. All columns with character datatypes accessible to the current user select owner as schema_name, table_name, column_id, column_name, data_type, data_length from sys.all_tab_cols where data_type in ('CHAR', 'VARCHAR', 'VARCHAR2', 'NCHAR', 'NVARCHAR2', 'CLOB', 'NCLOB') and owne...
5.将源 tablsspace_name 表空间置为 READ WRITE,使得表空间下的数据文件置为 READ WRITE 状态,(ALTER TABLESPACE tablsspace_name READ WRITE)。 6.在目的数据库上建立相应的用户 user_name 并赋予 CREATE SESSION 权限。 7.在目的数据库上利用 IMP 工具进行数据库表空间的迁移,(IMP INTERNAL/*** FILE=file...
2. desc tablename; Oracle: selectcolumn_name,data_type,nullablefromall_tab_columnswhereowner='LANCE'and table_name='TABLE_NAME'; 注意:TABLE_NAME 指表名 需要大写。 LANCE为当前用户名称。 3. show tables Oracle: selectTABLE_NAMEfromuser_tables; ...
This Oracle tutorial explains how to find all users that are created in the Oracle database with syntax and examples.Description You can find all users created in Oracle by running a query from a command prompt. The user information is stored in various system tables - ALL_USERS and DBA_...
USE_TABLESPACE When enabled this directive force ora2pg to export all tables, indexes constraint and indexes using the tablespace name defined in Oracle database. This works only with tablespace that are not TEMP, USERS and SYSTEM. WITH_OID Activating this directive will force Ora2Pg to add ...
sharedcursor就是指缓存在librarycache(SGA下的Shared Pool)里的一种library cache object,说白了就是指缓存在library cache里的sql和匿名pl/sql。 它们是Oracle缓存在librarycache中的几十种librarycache object之一,它所属于的namespace是CRSR(也就是cursor的缩写)。
Check if tables having Spatial columns(columns having datatype SDO_GEOMETRY) exist: --检查是否有表使用Spatial列,即列的类型为:SDO_GEOMETRY. set pages 200 col owner for a20 col table_name for a30 col column_name for a25 /* Formatted on 2012/3/8 13:48:49 (QP5v5.185.11230.41888) */ ...
三、删除数据1121131.语法一:delete from 表名114115select * from student_two116delete from student_two1171182.语法二:delete from 表名 where 条件119120注:删除一般要写条件,否则会把整张表的数据都删除了;121一般选择唯一键、主键做为条件122123delete from student where id=61241253.语法三:truncate table 表...