- published: 28 Oct 2015
- views: 9667
SQL Server may refer to:
SQL (i/ˈɛs kjuː ˈɛl/, or i/ˈsiːkwəl/;Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).
Originally based upon relational algebra and tuple relational calculus, SQL consists of a data definition language, data manipulation language, and a data control language. The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedural elements.
SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, "A Relational Model of Data for Large Shared Data Banks." Despite not entirely adhering to the relational model as described by Codd, it became the most widely used database language.
Drop, DROP, drops or DROPS may refer to:
In database relational modeling and implementation, a unique key is a set of zero, one, or more attributes. The value(s) of these attributes are required to be unique for each tuple (row) in a relation. The value, or combination of values, of unique key attributes for any tuple should not be repeated for any other tuple in that relation.
When more than one column is combined to form a unique key, their combined value is used to access each row and maintain uniqueness. These keys are referred to as aggregate. or compound keys. Values are not combined, they are compared using their data types.
When a column or set of columns is defined as unique to the database management system, the system verifies that each set of value(s) is unique before assigning the constraint. After the column(s) are defined as unique, an error will occur if an insertion is attempted with values that already exist. Some systems do not allow key values to be updated, and all systems will not allow duplicates. This ensures that uniqueness is maintained in both the primary table and any relations that are later bound to it.
PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7). Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database.
PL/SQL includes procedural language elements such as conditions and loops. It allows declaration of constants and variables, procedures and functions, types and variables of those types, and triggers. It can handle exceptions (runtime errors). Arrays are supported involving the use of PL/SQL collections. Implementations from version 8 of Oracle Database onwards have included features associated with object-orientation. One can create PL/SQL units such as procedures, functions, packages, types, and triggers, which are stored in the database for reuse by applications that use any of the Oracle Database programmatic interfaces.
In this tutorial, you'll learn the difference between delete/drop and truncate. PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7).[1] Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database. PL/SQL includes procedural language elements such as conditions and loops. It allows declaration of constants and variables, procedures and functions, types and variables of those types, and triggers. It can handle exceptions (runtime errors). Arrays are supported involving the use of PL/SQL collections. Implementatio...
Tutoriales de SQL server 2012 en español Descarga: Microsoft SQL Server 2012 Express http://www.microsoft.com/es-mx/download/details.aspx?id=29062 Tenemos un colaborador en el canal "David Hackro" Puedes contactar con TutorialesHackro en su canal o redes sociales. http://www.youtube.com/user/tutorialeshackro https://www.facebook.com/TutorialesHackro https://twitter.com/TutorialesHacko tutorialesdeprogramacion.hol.es
Follow this easy step by step easy tutorial to learn how to create and drop table in SQL Server via Query Editor. Don't forget to check out our site http://howtech.tv/ for more free how-to videos! http://youtube.com/ithowtovids - our feed http://www.facebook.com/howtechtv - join us on facebook https://plus.google.com/103440382717658277879 - our group in Google+ In this tutorial we will guide you on creating tables in SQL Server. As we know, the main components in databases are the tables, in which the data actually resides. Tables contain rows and columns, where columns act like the entity identifiers such as employee name, employee salary etc and rows contain the data values for those entities. So in this tutorial we will see how to create tables in SQL Server. Step 1 -- Navigating to...
In this tutorial we'll check out three very simple SQL Commands to create, use and drop Databases.
SQL Server / TSQL Tutorial : What is Schema in SQL Server & How to Create or Drop Schema Link to the script used in the video http://www.techbrothersit.com/2016/02/what-is-schema-in-sql-server-and-how-to.html What is Schema : As per Microsoft website : A Schema is distinct namespace to facilitate the separation, management, and ownership of database objects. How to create Schema by GUI: Open the SSMS and you will be going to Database as Schema are objects in the database. Go to Security and then Go to Schema and Right Click and Choose New Schema as shown below. Now you need to provide the Schema name. I used TB as Schema Name and I left the Schema Owner empty, that means that dbo will be owner for this schema. If you would like to choose owner, you can hit search and provide the owne...
How to add primary key in sql by query. To allow naming of a PRIMARY KEY constraint and describe how to drop primary keys .
T-SQL - ALTER e DROP TABLE; DROP COLUMN e CONSTRAINT - Alterar e Excluir Tabelas e Colunas - SQL Server
SQL Server / TSQL Tutorial Scenario: How to Drop Identity Property of a Column in SQL Server Table In this video we will learn how to drop identity property of a column in SQL Server Table. We will follow below steps. Add a new column with TestID to existing Table Update the records from Id ( Identity enable Column) to TestID (Newly Added) Column. Drop the Id ( Identity Enable Column) from Table Rename the Newly Added Column ( TestID) to Id. Link to scripts used in the video http://www.techbrothersit.com/2015/02/how-to-drop-identity-property-of-column.html Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server / TSQL Tu...
Blog link: http://www.rebellionrider.com/sql-primary-key.htm SQL tutorial on Primary key / SQL Primary key, In this tutorial you will learn about simple primary key, composute primary key, how to drop primary key. defining primary key using create table and alter table along with many other things. Tool used in this tutorial is SQL Developer. This tutorial series is part of SQL expert exam certification training. if you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts E-Mail RebellionRiderYT@gmail.com Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/rebellionrider Facebook. htt...
SQL queries for 1. Create table 2. Add new Column 3. Drop a column 4.change column data type
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This video will explain various ddl (create,alter,drop,rename)and dml commands (update,delete,insert,select)in sql with examples
Dr. Soper gives a lecture on using the structured query language (SQL) to work with databases. Topics include CREATE, ALTER, and DROP statements, SELECT, INSERT INTO, UPDATE, and DELETE FROM statements, subqueries, and inner and outer joins.
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Follow the Books: http://amzn.to/1RjjJCf A part of the 70-461 training, sponsored by Emergency Reporting. This week's training will cover stored procedures how to create/alter/drop and execute SQL Stored Procedures and how to use input and output parameters. As a bonus we cover User Defined Datatypes (as tables to pass into sprocs as an input parameter). Get the slides and scripts on my blog: http://www.aaronbuma.com/2015/04/stored-procedures-inputs-outputs-and-everything-between/