CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ( [ { column_name data_type [ STORAGE { PLAIN | EXTERNAL | EXTENDED | MAIN | DEFAULT } ] [ COMPRESSION compression_method ] [ COLLATE collation ] [ column_constraint [ ... ] ] ...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( { column_name data_type [ DEFAULT default_expr ] [ column_constraint [ ... ] ] | table_constraint | LIKE parent_table [ { INCLUDING | EXCLUDING } DEFAULTS ] } [, ... ] ) [ INHERITS ( parent_table [, ...
Specifies the action taken on the global temporary table when a COMMIT operation is performed. DELETE ROWS: all rows of the table will be deleted if no holdable cursor is open on the table. PRESERVE ROWS: the rows of the table will be preserved after the COMMIT. ...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( { column_name data_type [ DEFAULT default_expr ] [ column_constraint [ ... ] ] | table_constraint | LIKE parent_table [ { INCLUDING | EXCLUDING } DEFAULTS ] } [, ... ] ) [ INHERITS ( parent_table [, ...
create global temporary table temp_dept (dno number, dname varchar2(10)) on commit delete rows; insert into temp_dept values(10,'ABC'); commit; select * from temp_dept; --无数据显示,数据自动清除 on commit preserve rows:在会话期间表一直可以存在(保留数据) ...
创建临时表的关键字“temporary”可以缩写为“temp”。 PostgreSQL为了与其他数据库创建临时表的语句保持兼容,还没有“GLOBAL”和“LOCAL”关键字,但两个关键字没有用处。 三、示例 t开头的便是临时表。临时表会位于一个特殊的schema下面,此例是pg_temp_3 ...
方法1, 使用商业数据库的版本 EDB, 他们支持GLOBAL TEMP 数据表 方法2, 使用POSTGRESQL 的无日志表来模拟所谓的GLOBAL 表 POSTGRESQL 的UNLOGGED TABLE, 这个功能是在POSTGRESQL 9.1 上开始的,主要的原因也是为了某些数据的写入的性能. 通过UNLOGGED TABLE 来解决的原因是,性能的问题, 我们都知道临时表是没有日志写入...
https://www.codeproject.com/Articles/1176045/Oracle-style-global-temporary-tables-for-PostgreSQL 为了让PostgreSQL临时表的使用与Oracle兼容,除了内核层面兼容之外,目前只能在使用时注意。 CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ( [ ...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( { column_name data_type [ DEFAULT default_expr ] [ column_constraint [ ... ] ] | table_constraint | LIKE parent_table [ { INCLUDING | EXCLUDING } DEFAULTS ] } [, ... ] ...
CREATE TABLE AS 从一条查询的结果中定义一个新表。 CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name [ (column_name [, ...] ) ] [ [ WITH | WITHOUT ] OIDS ]AS query CREATE TABLESPACE 定义一个新的表空间。