Oracle

Oracle inventory directory2.7.2 Oracle inventory directory The Oracle inventory directory (Orainventory) Stores an inventory of all software installed on the system.It is required by, and shared by, all Oracle software installations on a

An example of a simple Oracle function returning an array [zz] Create or replace type t_ret_table is table of varchar2 (20 ); Create or replace function f_test (var_num in integer) return t_ret_table isVar_out t_ret_table;BeginVar_out: =

ORACLE trigger syntax There are two types of triggers: after and before, The syntax for Oracle to generate database triggers is: Create [or replace] trigger name trigger time trigger event On Table Name [For each row] PL/SQL statements Where:

In Oracle, the remainder is obtained using the MOD (numer1, number2) function, and the returned value is the other values. For example: Output 1 ~ All integer values in 13 that are not multiples of 3. Declare -- I number; begin for I in 1 .. 13

Oracle has two time types: Date and timestamp. Date, accurate to seconds, and timestamp to milliseconds.   1. Calculate the time difference of the date type   You can set the year, month, day, hour, minute, and second first.Use the to_char

First in the Oracle database to establish a Java object, this version of the SQLJ-SHELL can only support positive connections, reverse connections when there is a bug is not recommended to use, I don't know if ora supports Java or my personal

The SELECT statement in Oracle can use the start with... connect by prior clause to implement recursive queries. The connect by clause is used in structured queries. Its basic syntax is as follows: Select * From tablename start with cond1 Connect by

ASCII string ==> hexadecimal string Create or replace function asctohex (sin in varchar2)Return varchar2IsStmp varchar2 (4000 );I integer;BeginI: = 1;Stmp: = '';For I in 1 .. length (SIN) loopStmp: = stmp | trim (to_char (ASCII (substr (sin, I, 1), '

In frameworks/base/services/JNI Add: Com_android_server_helloservice.cpp The content is as follows: /** Copyright (c) 2009 the android open source project** Licensed under the Apache license, version 2.0 (the "License ");* You may not use this file

Start with connect by is used to create a tree structure for two fields with a parent-child relationship in a table. It searches for its subrecords in a tree structure starting from a field. 1. Create a table Create Table test_strat_wth111(Oid

Function Description: Cut the input string with the specified separator and return a one-dimensional array. Each array element is a substring. Source code: Create or replace type ty_str_split is table of varchar2 (4000 ); Create or replace function

Tables are divided into system tables and user tables.Database objects Tables (basic storage objects, composed of rows and columns), views (logical subset data obtained from one or more tables), sequences (unique serial numbers automatically

Document directory Difference between Schema and user Supplement Schema in SQL Server We know the database, as its name implies. the most important thing is data management, and data is stored in tables in the system. Therefore, almost all

Trigger is similar to procedure and function, but it cannot be displayed and called. It can only be triggered by an event and then automatically called by Oracle. generally, you can create a trigger for a table or view and trigger a trigger when you

  The prerequisite for Oracle's information lifecycle management tool Ilma is Apex.Apex is installed by default in Oracle 11g Release 2. It is not enabled after installation. You can use the following method to enable it.SQL> show userUser is

A Data grouping report was created several days ago and then re-ordered. It is written in crystal script. First, set a global variable to auto-add it, And then clear it in each group head. The code is very simple and I will not post it.After a short

Oracle 9i PGA usage control We know that Oracle has provided the automatic PGA management function since 9i. From then on, we can skip the annoying settings such as sort_area_size and hash_area_size, and do not need to compute the tedious PGA size.

I. Case Study A database has two tables about employee information, salary, and department information of a company. They are EMP and dept tables. The structure of the two tables is as follows: The requirements are as follows: 1. Create a

Brief Introduction InstallShield has built-in support for MySQL and Oracle. However, this function is implemented through ODBC and has strict requirements on the SQL script format. Therefore, an error is often reported when the script that has been

The data type (datatype) is an attribute in the column or stored procedure. Oracle supports three basic data types: Character Data Type Digital Data Type Other data types Character Data Type CHAR: the char data type stores fixed-length