Oracle

Original link--http://blog.csdn.net/qq525099302/article/details/47146393Why use a function to get sequence values see here--Create a function to get the next value of the sequence Create or replace function Get_seq_next (seq_name in varchar2)

Connect User: Connect username/password; Creating User: Create user username identified by password; Authorization: Grant permission to user name; Note: System permissions can only be granted by the DBA user, and an ordinary user may

11, querying the number of connections to Oracle2SelectCount(*)FromV$session;32, querying the number of concurrent connections for Oracle4SelectCount(*)FromV$sessionwhereStatus=‘ACTIVE‘;53, view the number of connections for different

First, when you run the Scott password hint error in cmd, you can change this, and Scott's unlock command is:To log on as a system user:CmdSqlplus System/tigertigerAlter user Scott identified by "Tiger" account unlock;-Learn the structure of blocks--

First, SQLLDR import txt1. Preparationa). txt fileThis is to be saved as unsigned UTF-8.b). Oracle Build Table2. Write the control file Input_test.ctlLOAD DATACHARACTERSET ' UTF8 '--Character Set settingsINFILE ' D:\input_test.txt '--The text data

Original works, from "Deep Blue Blog" blog, dark blue blog:http://blog.csdn.net/huangyanlong/ article/details/46864217 Note the steps to view the initialization parameters using the oracle11g online documentation.If you want to see, you can

description of MySQL data_add function and date format function Date_add (date, INTERVAL expr type) date_sub (date, INTERVAL expr type ) These functions perform date operations. Date is a DATETIME or date value used to specify the

First, IntroductionA logical backup is the process of exporting the structure and data of a data object to a file using the tools export.Logical recovery refers to the process of importing a data object into a database using a backup file when the

In the process of doing the project today, it is found that a field in a table in the development library has many values that are empty, while the value of the field in the test library is there.So, what is the way to update the value of the field

Global temporary represents a globally temporary tableMetadata for temporary tables is stored in the data dictionaryAllocate space for a segment of this table only when the first DML command occursThe visible range of temporal table data should be

Write the name of the stored procedure directly in the what value in PL/sql + "semicolon";beginsys.dbms_job.submit (Job=: Job, what= 'Del_ky_items;', Next_date=To_date ('24-06-2015 16:30:00','dd-mm-yyyy Hh24:mi:ss'), Interval= 'trunc (Sysdate,"'mi"')

1.plan_tableColumn Query_plan format A55Column cardinality format 99999Column cost format 99999Delete from plan_table;Set Lines 100Set pages 100Set echo onEXPLAIN PLAN forSELECT *From Hr.employees JOIN hr.departments USING (department_id);SELECT

Start a new instance name NewData1, Prepare PfileCP ..../dbs/init.ora./dbs/initnewdata.oraVim Initnewdata.oraChange the position of Controlfilecontrol_files= '/u01/app/oracle/oradata/newdata/control.ctl '2. Create SPFileSqlplus/as SYSDBAStartup

Oracle study--oracle 11gR2 RAC CRS startup failureSystem environment:Operating system: RedHat EL5Cluster:oracle 11gR2 GridOracle:oracle 11gR2In a RAC environment, one of the nodes CRSD the process failed to start:[[email protected] ~]$ CRSCTL Check

Oracle RAC 11gr2+weblogic cluster 6 node Project installation Implementation Maintenance Video Course PackagePackage Introduction: High salary must learn enterprise-class core application Oracle+weblogic cluster tutorial. Fundamentals: Introduction

--Select 30 of employees in the departmentSELECT * from EMP where deptno=30;--List all clerks ' names, departments, numbers--Using the internal connection, that is, the equivalent link, is also the most commonly used linksSELECT ename,empno,dname

/*Author:chdate:2015Theme:oracle TDE Test*/One transparent encryption (TDE, Transparent Data

Oracle Study---oracle Regular expressionCase Requirements:To set up a check constraint, require that the field input must be "00[number][number][a-z":The following constraints (constraint) are established through regular expressions:17:20:13 [email

Data cleansing Note: sorts strings to dates (A Date Field is processed in multiple formats) Background] When cleaning data, it is found that there are three types of data formats in a certain time field of the source system. It is suspected that

7. oracle learning starter Series 7-network management and Configuration Chapter 7 of oracle learning starter Series Network Management and Configuration In the previous article, we learned about models and users, including the definition of models