Indexes. They're one of the most powerful and misunderstood aspects of SQL performance. In this post we'll look at the purpose of an index, how to create and choose choose your index type. Then finish with a discussion of how to decide what to index and
The insert statement adds a new row or rows in a table in theOracle database. We generally use it after we have created a table in the database. One important point to remember is that while inserting records into a table, we must provide a value for every NOT NULL value. Let us lo...
create table customer_addresses ( customer_id integer, address_id integer, primary key ( customer_id, address_id ) ) organization index;This stores the values sorted by customer_id, then address_id. So all the addresses for customer 1 are next to each other on disk. So...
Steps for Connecting SQL Server and Oracle 1. Creating the mwrep User Perform the following actions to create a new database user: It should be noted that you can skip these steps if you already have a system orcl connection and a mwrep user. Step 1: Use the desktop icon to launch ...
Oracle SQL Developer is the database IDE and Oracle SQL Developer Data Modeler is our dedicated data modeling solution. Where it gets interesting is that the entire Data Modeler product also runs inside of SQL Developer. When I do demo’s of building quick ad hoc models in SQL Developer, ...
I’ve always appreciated the CREATE OR REPLACE functionality in Oracle for views, packages and triggers, and I’ve often wanted a similar CREATE OR REPLACE TABLE. Many times, I’ll find myself needing to quickly drop and re-create a table while I’m designing it. ...
Add months to GETDATE() function in sql server Add new row to datagridview one by one dynamically Add Node existing XML file Add one Column runtime to datagrid view at specific index in C# Add picture into specified Excel cell Add registry values in setup project ADD Root Node to XML in...
Oracle GoldenGate - Version 12.1.2.0.2 and later: OGG: How to create UNIQUE index for OGG REPLICAT that is not used by DATABASE APPLICATION SQL
Updated: Nov 2009 for SQL Developer 2.1 1. Introduction Oracle SQL Developer provides a SQL Worksheet that you can use to update data, by writing simple or complex SQL statements. In this How-To, we look at the most basic of these, inserting a record, updating single and multiple records...
To define asavepointin a transaction, use theSAVEPOINTcommand. The following statement creates the savepoint namedADD_EMP1in the current transaction: SAVEPOINT Add_emp1; If you create a second savepoint with the same identifier as an earlier savepoint, the earlier savepoint is erased. After creati...