Oracle

1, check the user's proifle is which, is generally default:Sql>select username,profile from Dba_users;2. View the password expiration settings for the specified profile (such as default):Sql>select * from Dba_profiles s WHERE s.profile= ' DEFAULT '

Oracle Table Partitioning DetailedThis article organizes the concepts and operations of partitioned tables from the following aspects:1. Table space and the concept of partitioned tables2. The specific role of table partitioning3. Advantages and

With PCT as(SELECT Tablespace_name as Tablespace_name,----bytes/1024/1024/1024 as "file_size",Round (100* (user_bytes/1024/1024)/decode (maxbytes, 0, bytes/1024/1024,maxbytes/1024/1024), 3) as percentFrom Dba_temp_files)SELECT * FROM pctRight

I. Oracle monitoring exception1. Check whether the Oracle database is started: Ps-ef | grep ora2. Check whether the Oracle database listener is started: Ps-ef | grep LISTEN3. Check if the Oracle DB Listener is healthy: lsnrctl statusIf not started,

1. Create a tableCreate Tabletest01 (IDint not NULL Primary Key, namevarchar(8) not NULL, Gendervarchar2(2) not NULL, Ageint not NULL, Addressvarchar2( -)default' Address Unknown ' not NULL, Regdata date);Constraintsnonempty constraint NOT

Originally configured database listening with Plsql login error ORA-12514 the TNS Listener is currently unable to identify the connection Descriptor request ServiceOnline said change Listener.ora Add the following configurationSid_list_listener = =

1. Create a database connectionCREATE Public DATABASE to by ' ( DESCRIPTION = ( ADDRESS = (PROTOCOL = TCP) (HOST = 134.103.65.206) (PORT = 1521)) (Connect_data = (SERVICE _name = ORCL) )';2. Create a stored procedureCreate or Replace

The batch script under window is as follows:REM@echo offREMGets the current date string for/F "tokens=1,2,3 delims=/-"%%a in ("%date%") Do@SetD=%%a%%b%%cEcho%d%Setlog=%d%.LogSetbackup_dmp=bbtj%d%.DMPSetbackup_log=bbtj%d%.Log(REMToggle Drive

There are several commonly used string functions in Oracle:1, Upper ()---Convert the contents of the string to uppercase, lower ()---all the contents of the string to lowercase . Specific usage:Select upper (' Test '), lower (' test ') from dual2,

SQL language is a common database languageSQL commands can be divided into data definition language, data manipulation language, transaction control language and data Control languageData types supported by Oracle include characters, values,

"Replace" "Cursor" "Loop" "Fetch"In Oracle, several linked processes can be grouped together to form a package.Https://www.2cto.com/database/201610/559389.htmlCursor definition: Cursor [cursor name] is [SQL statement]Open the Query window in PL SQL,

The Scott users in Oracle are turned off by default and need to be set manually if we want to use Scott users.The directory where the Scott demo mode of Oracle is located in the Linux environment:$ORACLE _home/rdbms/admin/utlsampl.sqlTo add a step:1:

1.1oracle installation omitted2.1sql*plus Connection DatabaseEnter "C:\sqlplus/nolog" into the DOS interfaceSql>conn System/[email protected]Sql>select * from Scott.emp;Connect to specified database: Sqlplus username/[email protected]:p Ort/sidAfter

background: A deadlock session in the database has soared. The following is expected to quickly locate common locks, rapid intervention processing, and database performance recovery. Long-term operation through the following statements? T more than

1. Data class processing of the self - increasing length MysqlHave self-MoveIncreaseLongof dataClassType, insertionWhen recordingWithout manipulating this field, youDynamicGet DataValue。ORACLENo self-MoveIncreaseLongof dataClassNeed to build a

Several basic operating instructions and their meanings in OracleData definition Language (DDL): Objects used to create, modify, and delete databases (Operations on columns)1.CREATE: Create a structure for a table or other object2.ALTER: Modify the

1, dynamic parameter binding, can realize the dynamic execution of different SQL-- Create a package Create or Replace as is cursor; procedure inch Number , emplist out empcursor); END MyPackage;--Create a package bodyCreate or

"ORA-04076: Invalid NEW or old description" may occur when the Oracle command line is operatingYou need to add "old" in the conditional statement before the job. (because it is in the when condition, so do not ":".)If you use if instead of when, the

Oracle data typesDigital type: number, floatDate type: date, TIMESTAMPString:TIMESTAMPYear: In the same sysdate yearMonth: In the same sysdate monthDay: No. 1thHours and seconds: 0To_dateDateThe delimiter in the –to_date can be replaced, and the

Whether it is development or testing, work often need to go to batch new test data, but the new speed of large amounts of data sometimes makes us miserable, the following two ways to complete the batch of Oracle data Additions, compare the