Oracle sql语句练习

1、 创建表空间

create bigfile tablespace viot_data_400w1logging datafile 'E:\data\viot_data_400w1.dbf' size 20g autoextend on next 1g;

注释：
viot_data_400w1 表空间名称；E:\data\viot_data_400w1.dbf 表空间位置（前提需创建E\data文件夹；20g 默认的表空间大小1g 表空间写满后，自动扩展的大小。

2、创建表，并对表指定分区

create TABLE TEMP400W
(
"RYBH" VARCHAR2(20 BYTE),
"ZPBH"VARCHAR2(20 BYTE),
"RXZP"BLOB,
"XM"VARCHAR2(30 BYTE),
"XB"CHAR(1 BYTE),
"ZJHM"VARCHAR2(20 BYTE),
"INCCOLUM" NUMBER NOT NULL PRIMARYKEY
)
PARTITION BY RANGE (INCCOLUM)
(
PARTITION CUS_PART1 VALUES LESS THAN (900000) TABLESPACEviot_data_400w1,
PARTITION CUS_PART2 VALUES LESS THAN (1800000) TABLESPACEviot_data_400w2,
PARTITION CUS_PART3 VALUES LESS THAN (2700000) TABLESPACEviot_data_400w3,
PARTITION CUS_PART4 VALUES LESS THAN (3600000) TABLESPACEviot_data_400w4,
PARTITION CUS_PART5 VALUES LESS THAN (4500000) TABLESPACEviot_data_400w5
)

注释：创建表TEMP400W; 并且为表指定4个分区；CUS_PART1 存储0-900000的记录；CUS_PART2存储第900001-1800000的记录，以此类推；

3、 查看表分区

select * from user_tab_partitions where table_name = 'TEMP400W'

注释：查看TEMP400W的所有分区

4、 修改表操作不写日志

alter   table  temp400W   NOLOGGING

5、创建DBLink的授权给scott用户

grant CREATE PUBLIC DATABASE LINK，DROP PUBLICDATABASE LINK to scott;

6、创建数据库链接

CREATE PUBLIC DATABASE LINK viot_dblinkCONNECT TO viot IDENTIFIED BY viot USING '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.12.110)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = viot)
)
)'

7、连表查询插入语句。

insert intotemp400W(rybh,zpbh,rxzp,xm,xb,zjhm,inccolum) selectrybh,zpbh,rxzp,xm,xb,zjhm,inccolum1 from temp400W@viot_dblink

8、查看表空间的使用率

SELECT a.tablespace_name                        "表空间名",
total                                    "表空间大小",
free                                     "表空间剩余大小",
( total - free )                         "表空间使用大小",
Round(( total - free ) / total, 4) * 100 "使用率   %"
FROM   (SELECT tablespace_name,
Sum(bytes) free
FROM   DBA_FREE_SPACE
GROUP  BY tablespace_name) a,
(SELECT tablespace_name,
Sum(bytes) total
FROM   DBA_DATA_FILES
GROUP  BY tablespace_name) b
WHERE  a.tablespace_name = b.tablespace_name

参考链接： http://blog.chinaunix.net/uid-11570547-id-58989.html http://soft.chinabyte.com/database/290/12218290.shtml /article/5044840.html