Oracle

@echo off Setlocalrem main modified belt!!! Number of the next line of REM data instance name!!! Set SID=ORCLREM user name!!! Set Username=sysrem password!!! Set Password=123456rem the user who needs to be backed up!!! Set Schemas=userrem userid

extent--Minimum Space allocation unit--tablespace managementBlock-min I/O Unit--segment ManagementCreate tablespace JamesDataFile '/export/home/oracle/oradata/james.dbf 'Size 100M--Initial file sizeAutoextend on-Automatic growthNext 10M-Each

Whenever the database server restarts, restart the database for monitoring and instance, especially in the case of server power-down restart, routine maintenance. Can the instance and listener start as the service starts, like Windows Server? The

This paper briefly discusses the problems in use of in,exists and not in and not exists, mainly the choice of keywords, the optimization of SQL* Note: The following example is a table with Oracle built-in users, and if you do not select the Do not

Background Description:1, the original installation Zabbix is in the lamp environment is able to operate normally; (Linux CentOS 7)2, now want to replace MySQL with Oracle, through the installation of Oracle client remote access to another machine

Prerequisite: Under the cmd commandExport command: EXP username/password @ database owner= user name file= file storage path (for example: F:\ABCD.DMP)TEST: Exp zm/[email protected] OWNER=ZM file=f\abcd.dmpImport Command: IMP username/password @

To write a program today, the environment is win8.1+ vs2012+ Oracle, but there is an unexpected problem:Abnormal! The following is a detailed error message for the database: BadImageFormatException is raised when attempting to load the Oracle client

In many books about Oracle's database management, it's often said that you want to put different types of files on different disks. In the process of individual self-study, it is not possible to implement multiple disks. Here's how to construct a

1. Data typeVARCHAR2 ()Number ()DATEClobBlob2. Copy table: CREATE TABLE TableName as SELECT * from emp3. New column: ALTER table name Add (field Name field type default defaults);4. Modify columns: ALTER table name MODIFY (field Name field type

Next_day () Gets the date of the next one days of the current date, from the literal meaning easily understood to be the date of the following day to get the current date. For example: Select Next_day (to_date (' 20160330 ', ' YYYYMMDD '), 1) from

First, the archived switch1. Check if the archive is open:sql> archive log list;2. Set the archive pathSql> alter system set log_archive_dest_1= ' LOCATION=D:\ARCH2 ';3. Open Archivesql> shutdown immediate; --Close the databasesql> startup Mount;

Oracle can only be natively connected and not connected to other computers on the networkOracle listens only to local 127.0.0.1, causing the network other computers to not connect to the workaround:Modify the Listener.ora listening file to change

In Oracle, there are three kinds of equals: <>,!=,^=For example:SELECT * FROM test where name<> ' xn '. The returned result is a record where name is not xn and name is not empty. But this is not the same as what we want to get, because our goal is

1. Two tables (multiple tables) associated update--the modified value is calculated by another table　　Update Customers A　　Set City_name= (select B.city_name from tmp_cust_city b where b.customer_id=a.customer_id) 　　where exists (select 1　　From

Left paddingSelect Lpad (' ABCDE ', ten, ' 0 ') from dual; = = "00000abcdeSelect Lpad (' ABCDE ', ten, ' X ') from dual;== "XxxxxabcdeThe syntax format is as follows: Lpad (String, Padded_length, [pad_string]) string prepares to be populated, and

SELECT * FROM t where rownum=1 can query out data, while select * from T where rownum=2 can not query out data. In the case of where rownum = 1, the first row passes the test, is output and rownum goesto 2. No other row ever satisfies the predicate

about Oracle with as usage– For an aliasWith TMP as (SELECT * from Tb_name)– For multiple aliasesWithTMP as (SELECT * from Tb_name),TMP2 as (SELECT * from Tb_name2),Tmp3 as (SELECT * from Tb_name3),... 1 2 3 4 5 6 7 8 9

----------------1. Database Update Operations-----------------------------SELECT * FROM tab;--query tabledrop table siebel_user;--Delete tables--copy a table structureCREATE TABLE Myemp as SELECT * from EMP;SELECT * from Myemp;--Insert RecordInsert

Unconsciously also 10 days, weekends and overtime, I would like to take a half-day Monday morning to see the final NBA Finals ... Later, after all, is not a hardcore fan, back in the evening to repair the video to see the collection good.Company A

1. Create a table spaceCreate TablespaceExample_tablespaceDataFile ' e:\****.dbf ' size 10mReuse autoextend on Next 1m MaxSize Unlimited ;2. Create user, specify Tablespace, temp table spaceCreate userusernameIdentified byPasswordDefault