Oracle

   today is April 5, 2016, the previous study plan has not been implemented, found that they are still a weak willpower people! No matter how busy the future, all hope that they can put the study plan to persist, with empty mentality to re-learn

Recently in the study of Oracle view problem, originally wanted to turn into materialized view (materialized view), which can greatly improve the response time of the system, but the workload is too large, so we studied the problem of SQL

Create or replace procedure test(jf_id in Nvarchar2,yf_id in Nvarchar2)AsV_length Number: = Length (yf_id);V_start number: = 1;V_index number;Beginwhile (V_start LOOPV_index: = INSTR (yf_id, ', ', v_start);IF V_index = 0ThenDbms_output.put_line

D:\dev\product\11.2.0\dbhome_1\NETWORK\ADMINConnect to other machines:PL Preferences Configuration:Oradb11g_home1D:\dev\product\11.2.0\dbhome_1\bin\oci.dllPl:192.168.0.153/oanetListener.ora no changes required# Listener.ora Network Configuration

I.Oracle temp Table knowledgeIn Oracle, temporary tables are divided into two sessions (session level), TRANSACTION (transaction level), and session-level temporal table data exists throughout the session until the session is closed; Temporary table

1. Displays all partition table information that the current user can access:All_part_tables2. Displays information about all the partition tables for the current user:User_part_tables3. Display table partition information displays detailed

The installation process is relatively simple. Follow the steps to go. Here is a reminder to use PL/SQL to operate Oracle. It is best to install 32-bit Oracle programs. The reason is that the web says PL/SQL only supports 32-bit Oracle, assuming

If you install the CodeSmith5.2 version, SQL Server does not have any problems, and Oracle can only get comments from the column and not get the table comments, after looking for data in many ways, find the most important solution, SQL statement, as

1. Show jobs with average salary of >2000Select Job,avg (SAL) from EMP Group BY job have avg (SAL) >2500;2. Calculate the salary above 2000, the average salary of various positions is more than 3000 of the position and average salarySelect Job,avg

Add a field to a table in the Oracle database:ALTER TABLE TableName add Client_os varchar2 (a) default ' 0 ' NOT null;Add multiple fields to the Oracle database:ALTER TABLE TableName Add (name VARCHAR2 () default ' anonymous ' not null,age number

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--SDE User Login Execute the following statementGrant INSERT, UPDATE, delete on Sde.table_registry to public;grant inserts, UPDATE, delete on Sde.column_registry to public Grant INSERT, UPDATE, delete on Sde.geometry_columns to public;grant inserts,

Using DBCA, the Global database name is: prod.origtec.com Sid:prod An Oracle database was uniquely identified by a Global database name,typically of the form "Name.domain" Global Database Name: A database is referenced by at least one Oracle

This article mainly introduces Python's operational learning of Oracle DatabaseIncludes: Installation and configuration of Oracle database under Windows operating system, third-party expansion packages that Python needs to install, and sample

"IT168 comment" In many cases, we will need to insert a large amount of data into a table, and want to complete the work in as short a time as possible, here, and you share some of my usual experience in doing a lot of data insert.Premise: Before

1. Collection--Set operation: set, intersection, Difference .Select Deptno,job,sum (SAL) from the EMP Group by Deptno,jobUnionSelect Deptno,to_char (null), SUM (SAL) from the EMP Group by DeptnoUnionSelect To_number (null), TO_CHAR (null), SUM (SAL)

1. What is a primary key ?A: You can uniquely and fully identify a combination of data columns and rows in a data table, only one and cannot be empty.2, what is the foreign key ?A: A foreign key for another table exists in one table.3 . Differences

Creation and use of oracle sequence, creation of oracle Sequence Create sequence demo_s: Create sequence demo_sminvalue 1000 maxvalue 999999999999999999 start with 1000 increment by 1 cache 20; Explanation: Increment by: Specifies the sequence

Summary exercises with simple SQL statements and summary exercises with SQL statements Create a table to record employee personal information:   -- Create a table create table plspl_company_info (empno number (5) not null, ename varchar2 (10) not