Oracle

InStr (String,substring[,start[,occurence]])Third parameter, start the search locationThe fourth argument, the substring of the search appears several times. such as: Select InStr (URL, ' X ', 1,2), URL from table_name where select_condition

The bitmap index of the 1,oracle database (Bitmap index) is indeed for those fields that are sparse (low-cardinality, low cardinality), but one thing to keep in mind is that it is for fields whose values do not change frequently. In practical

Interpretation in document: It returns TRUE if an INSERT, UPDATE, or DELETE statement affected no rows, or a SELECT into statement returned no Rows. Otherwise, it returns FALSE. The explanation is more subtle: %notfound is the logical opposite

Four ways to start Oracle databases 1, Startup Nomount Non-installation startup: This way to launch executable: Rebuild the control file, rebuild the database, start the instance, that is, start the SGA and background processes, this startup

Today in the virtual machine in the centos6.3 system installed Oracle 11g out of many problems, first record the interface garbled problem bar. This interface appears during /runinstaller installation: Zysong.ttf download is an Oracle font

There are five main loops: Exit when, loop, while, for (normal loop), for (cursor loop), and below for example one by one (all stored procedures).1, Exit when cycle:Create or replace procedure Proc_test_exit_when isI number;Begini:=0;LOOPExit when

Oracle Related dictionaries: User_source user's stored procedure, function's source code dictionaryDba_source The source code Dictionary of the stored procedures and functions for all users of the entire systemAll_source the current user can use

Objective:A long time ago, estimated in 2010 years or so in the use of Oralce, there is a need to match the data of the two tables, the two tables of the structure of the same, one is a formal table, a temporary table, the two tables of data is a

/* Quick Flashback PROCEDURE PACKAGE PACKAGE body type body TRIGGER FUNCTION type 1. Use the SYS administrator to log in 2. Command Window execution (for easy access to data, will retrieve the data stored in TXT

Build Table Statement (ORACL) (Contains records) --Create TABLE CREATE TABLE STUDENT (studentid number (), studentname VARCHAR2 (30), studentscores Number (3) ) INSERT into STUDENT (StudentID, Studentname, studentscores) VALUES (1001, '

This article address: http://blog.csdn.net/kongxx/article/details/7107683 After installing the cx_oracle and Oracle Instant client packages, the following problems occur when importing packages using import Cx_oracle

Oracle Bulk Import test data One, test WinDOS methodDeclareMAXRECORDS constant int:=1000;I int: = 1;BeginFor I in 1..maxrecords loopINSERT INTO Test2(ID, name)Values(Test2_seq.nextval, To_char (' 9999 ' +i));End Loop;Dbms_output.put_line ('

--1, select employees in Department 30 SELECT * from EMP where deptno=30; --2, listing the names, numbers and departments of all clerks Select Ename,empno,dname from EMP e INNER JOIN dept D on e.deptno = D.deptno where Job=upper (' clerk '); --3,

Oracle provides internal functions: numtodsinterval (,), X is a number, add and subtract values, can be decimal and fractions, such as 1,1/2, 0.05 C is a string, for the addition and subtraction units, commonly used units have (' Day ', ' hour ', '

"-//hibernate/hibernate Configuration DTD 3.0//en""Http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" > systemJdbc:oracle:thin: @localhost: 1521:collegeOrg.hibernate.dialect.Oracle9DialectOraclepassword the connection

Package test; Import Java.text.SimpleDateFormat; Import Org.hibernate.SessionFactory;Import org.hibernate.Transaction;Import org.hibernate.cfg.Configuration;Import org.hibernate.classic.Session; Import Po. Stu; public class Insert1 { /*** @param

1 steps; New Wed Project2, right key-myeclipse-add Hibernate capabilities ...Hibernate 3 Keep the default to--next--next--Datasource:use JDBC DriverDB Driver: Provides alternative drivers, such as newly built drivers: ORACLE9/10The following

First define cursors and variables CURSOR C1 is SELECT ename,ejob from emp WHERE deptno=10; V_name VARCHAR2 (10); V_job VARCHAR2 (10); First: Using loop loopsOpen C1;LoopFetch C1 into v_name,v_job;Exit when C1%notfound;......End LoopColse C1;It is

from:http://space.itpub.net/22664653/viewspace-711728 Python ConnectionOracle Database, you need to use the Cx_oracle package.1 Download Cx_oracleDownload address for this package: When downloading http://cx-oracle.sourceforge.net/, be careful to

Several ways in which a function/procedure in Oracle Returns a result set: In the case of function return, the stored procedure can only be changed to out parameters and passed in the Oracle 10g test. (1) Return cursor: The return type is: