CREATE PROCEDUCE p1 () ( INSERT INTO temp_table VALUES (xxx); SELECT * FROM temp_table WHERE ROWNUM = 1 INTO var1; ); 由于不同 Session 对临时表访问无法共享计划,每个 Session 都需要编译一次这个 Procedure p1 生成对应的 Cache,可能导致稳定
CREATE TABLE也会自动地创建一个数据类型来表示对应于该表一行的组合类型。因此,表不能用同一个模式中任何已有数据类型的名称。 可选的约束子句指定一个插入或更新操作要成功,新的或更新过的行必须满足的约束(测试)。一个约束是一个 SQL 对象,它帮助以多种方式定义表中的合法值集合。 有两种方式来定义约束:表约...
First, you create a primary key on a column that must be unique. This can be difficult on a temp table that contains dynamically inserted records. The query used above uses logic that says the records inserted should be unique, but SQL will throw an error if you try to make a primary ...
we will see how we could create a temporary table. The temporary table is just like another table but we have to use the keyword ‘GLOBAL TEMPORARY’ in the create table query. For this example, we will create a temporary table named temp_table having...
(2)On Commit Preserve Rows :数据在 Session 期间有效,一旦关闭了Session 或 Log Off 后,数据就被 ORACLE 自动 Truncate 掉。 SQL> CREATE GLOBAL TEMPORARY TABLE QCUI_Temp_Sess 2 ON COMMIT PRESERVE ROWS 3 AS 4 SELECT * FROM t_Department; ...
SQL Script: Create Table in Oracle Copy CREATE TABLE Employee( EmpId number PRIMARY KEY, FirstName varchar2(20), LastName varchar2(20), Email varchar2(25), PhoneNo varchar2(25), Salary number(8) );Note that, in Oracle, the string data type is called varchar2, and integer type is ca...
parameter has been set. In this case, Oracle creates a 100 MB Oracle-managed tempfile in the default file destination specified in the parameter. The file hasAUTOEXTENDenabled and an unlimited maximum size. If theDB_CREATE_FILE_DESTparameter is not set, then you must specify theTEMPFILEclause...
Oracle Database Administrator's Guide and CREATE TYPE for more information about creating objects ALTER TABLE and DROP TABLE for information on modifying and dropping tables Prerequisites To create a relational table in your own schema, you must have the CREATE TABLE system privilege. To create ...
create private temporary table ora$ptt_toys ( toy_name varchar2(10), weight number, colour varchar2(10) );NOTE: the cryptic ora$ptt_ prefix for the table name. This must match whatever your database's private_temp_table_prefix parameter is set to. Otherwise it won't work! Also,...
In Oracle database, the datatype for an integer column is represented as "number". In Sybase it is represented as "int".Oracle provides another way of creating a table.CREATE TABLE temp_employee SELECT * FROM employee In the above statement, temp_employee table is created with the same ...