1, this is a very painful problem, with will always report SQL syntax error, I use the test OK here, with seemingly also line2. Bulk INSERT error encountered with Oracle sequence increment: java.sql.sqlsyntaxerrorexception:ora-02287: Ordinal is
In MySQL There are keyword group_concat that provide similar functionality, and similar feature keywords in Oracle are wm_concat. For example, I have the following query data:But I would like to be able to display a row of queries, the result graph
In the manual creation of Oracle, will encounter a lot of errors, that process is really let people want to die heart has, but when the database was created successfully, the heart really feel very happy ah, now will I encountered the problems are
I haven't updated my blog for a long time, mainly because I changed my job years ago. The new job is very busy, and seldom time to blog the garden.As an Android developer, why should I learn Oracle database? I am a non-computer professional, and the
One, the Oracle installation process is slightlyII. SYS user and system user(1) SYS user is superuser, has the highest privilege, has SYSDBA role, has CREATE DATABASE permissionThe default password is Change_oninstall(2) The system user is the
in the garden there are a lot of Ef+mvc+easyui framework is too much, after a period of time to learn to write ideas, but all for the SQL data, but this year I became the team leader of the first task is to write a general platform framework, a
Architecture Diagram Learning:
The story of Lao Yu's clothing store
Structure diagram:
SQL query Statements
Sga
Shared pool
Data buffer Buffer Cache
Pga
Due to the sheer size of Oracle, there are times when we need to connect to a remote database with only the Oracle client installed, such as Plsql, Toad, and so on, but without Oracle there is no configuration file to support it. Finally found a
--Create a result temp table at the transaction levelCreateGlobalTemporary TableTmp_yshy (C1varchar2( -), C2varchar2( -)) on Commit Deleterows;--Create a temporary table that stores SQL statements at the transaction levelCreateGlobalTemporary
Summarizes the common SQL used to view Oracle databases and helps to optimize a robust system program for analysis.1. Current number of database connections:Select COUNT (*) from v$process2. Maximum number of connections allowed for the
IP specification for AIX and Linux hosts running Oracle/etc/hosts to change.For Linux:/etc/sysconfig/network-scripts/ifcfg-ethx to change,To Aix:smitty tcpip->mininum Configuration & startup->available Network InterfacesOracle's Listener.ora file to
Start by logging in to the database with SYS or the system user at the command line interface, by:1) Run: cmd2) sqlplus→ Enter3) sys/as sysdba→ enter → EnterExecute the SQL statement that created the user:Create user username identified by
Problem 1:oracle when inserting data, sometimes Chinese becomes????? Cause: Chinese characters are garbled because the character set of the current computer and the character set on the server are inconsistent. Solution: Set environment variables on
The first method:Select substr (t,1,instr (t, ', ', 1)-1) from (Select Substr (S,instr (S, ', ', 1,rownum) +1) | | ', ' as t,rownum as D, InStr (S, ', ', 1,rownum) +1 from (Select ', Tt,aa,bb ' as s from dualConnect by InStr (S, ', ', ' 1 ', rownum)
Public Map getinwarehousereport (int i, int J, Inwarehouse Inwarehouse) {Total number of bars after query groupingString countquery= "Select Ws_sku_id,sum (In_number), sum (Wh_money) from In_warehouse p Group by ws_sku_id";Calculate End Lineint
RMAN backup failed: ORA-19502 & ORA-27072: File I/O error, rmanora-19502
When checking an ORACLE database's RMAN backup email in the morning, it was found that there were errors such as ORA-27072: File I/O error, the details are as follows:
channel
Solaris process management and process management
View the dynamic and static information of the Process, foreground and background processes, and kill the process.
Three processes: interaction process, daemon process, and batch processing process
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