1) Creating a transaction-specific global temporary table example First, create a transaction-specific global temporary table using the ON COMMIT DELETE ROWS option: CREATE GLOBAL TEMPORARY TABLE temp1( id INT, description VARCHAR2(100) ) ON COMMIT DELETE ROWS;Code language: SQL (Structured Query ...
Temporary tables are useful in applications where aresult set must be buffered. For example, a scheduling application enables college students to create optional semester course schedules. Each schedule is represented by a row in a temporary table. During the session, the schedule data is private. ...
创建私有临时表可以使用CREATE PRIVATE TEMPORARY TABLE语句,类似于创建普通表,但添加了PRIVATE TEMPORARY关键字。例如: sql CREATE PRIVATE TEMPORARY TABLE ptt_example ( id NUMBER, name VARCHAR2(50) ) ON COMMIT PRESERVE ROWS; 其中,ON COMMIT PRESERVE ROWS指定了在事务提交后保留表中的数据。如果不指定此选...
Temporary tables are useful in applications where a result set must be buffered. For example, a scheduling application enables college students to create optional semester course schedules. Each schedule is represented by a row in a temporary table. During the session, the schedule data is private....
data exists for the duration of the session. Data in a temporary table is private to the session. Each session can only see and modify its own data. DML locks are not acquired on the data of the temporary tables. The LOCK statement has no effect on a temporary table, because each sessi...
11、rea (startdate DATE, enddate DATE, class CHAR(20) ON COMMIT PRESERVE ROWS;EXAMPLE:会话1:SQL> drop table admin_work_area;SQL> CREATE GLOBAL TEMPORARY TABLE admin_work_area 2 (startdate DATE, 3 enddate DATE, 4 class CHAR(20) 5 ON COMMIT PRESERVE ROWS;SQL> insert into permernate ...
EXAMPLE: 会话1: SQL> drop table admin_work_area; SQL> CREATE GLOBAL TEMPORARY TABLE admin_work_area 2 (startdate DATE, 3 enddate DATE, 4 class CHAR(20)) 5 ON COMMIT PRESERVE ROWS; SQL> insert into permernate values(2); SQL> insert into admin_work_area values(sysdate,sysdate,'sessio...
Managing Space in a Temporary Tablespace: Example The following statement manages the space in the temporary tablespace created in "Creating a Temporary Tablespace: Example" using the SHRINK SPACE clause. The KEEP clause is omitted, so the database ...
若数据库版本大于等于 12.2.0.1 时,在创建非 cdb 或包含至少一个 pdb 的 cdb 数据库时,会创建示例数据库,但是相关的示例数据位于 SYSAUX 表空间。若数据库版本小于 12.2.0.1 时,则示例数据位于 EXAMPLE 表空间。 12c 版本的 CDB 数据库不再包含示例数据库和示例表空间。
EXAMPLE 100 20.75 79.25 UNDOTBS1 110 96.625 13.375 在SQL命令行情况下将结果输出到指定文件中。 SQL> spool out.txt SQL> select * from v$database; SQL> spool off 三、查看、管理ORACLE数据文件 查看数据文件: SQL> select name from v$datafile; ...