Oracle常用命令大全集（4）

第五章：约束

1.define constraints as immediate or deferred

sql> alter session set constraint[s] = immediate/deferred/default;

set constraint[s] constraint_name/all immediate/deferred;

2. sql> drop table table_name cascade constraints

sql> drop tablespace tablespace_name including contents cascade constraints

3. define constraints while create a table

sql> create table xay(id number(7) constraint xay_id primary key deferrable

sql> using index storage(initial 100k next 100k) tablespace indx);

primary key/unique/references table(column)/check

4.enable constraints

sql> alter table xay enable novalidate constraint xay_id;

5.enable constraints

sql> alter table xay enable validate constraint xay_id;

第六章：LOAD数据

1.loading data using direct_load insert

sql> insert /*+append */ into emp nologging

sql> select * from emp_old;

2.parallel direct-load insert

sql> alter session enable parallel dml;

sql> insert /*+parallel(emp,2) */ into emp nologging

sql> select * from emp_old;

3.using sql*loader

sql> sqlldr scott/tiger \

sql> control = ulcase6.ctl \

sql> log = ulcase6.log direct=true