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| SQL Server Basics Truncate Query in SQL Server learn sql - truncate query in ms sql server 2008, ms sql server 2012, ms sql server 2014, ms sql server 2016 Description The SQL SERVER Truncate query will delete all the records at a shot from the table in SQL Server. Syntax Below is the sql code for delete statement in sql server TRUNCATE TABLE table_name; Facebook.com/wikitechy twitter.com/wikitechy © Copyright 2016. All Rights Reserved. | SQL Server Basics Parameters or Arguments table The table on which we need to truncate or delete all the records at a shot. Example- truncate statement in sql server Delete statement will one or more condition to filter the data before deleting is really important or else it will delete the entire records in the table. Syntax truncate table dbo.Customers The above statement will truncate the entire records from the table at a shot. Delete from table dbo.customers Facebook.com/wikitechy twitter.com/wikitechy © Copyright 2016. All Rights Reserved. | SQL Server Basics Even, delete statement do the same job right. Then, what’s the difference. Delete vs truncate 1. Delete statement’s data can be rolled back where as truncate statement data cannot be rolled bac 2. Delete statement is one by one record removal and the data is stored in log file. Truncate statement is a batch statement executed at a shot. 3. Truncate statement is faster than delete statement from database query tuning and database performance perspective. Syntax DELETE FROM table_name WHERE [condition1] and [condition2] Sample sql Code Prerequisite query: create table dbo.cutomers(customerid int, city varchar(100)) go Facebook.com/wikitechy twitter.com/wikitechy © Copyright 2016. All Rights Reserved. | SQL Server Basics The above queries will create a table and the data will be inserted into it. Already if you got customers table which we created in our previous excercises. Do not worry, pass only delete statement to it. Here is the query, Delete from dbo.customers -- This query will delete all records and pass the insert statement. Now execute your insert statements. insert into dbo.Customers values (1,'New York') insert into dbo.Customers values (2,'washington') insert into dbo.Customers values (3,'Los Angeles') insert into dbo.Customers values (4,'Chicago') insert into dbo.Customers values (5,'Houston') insert into dbo.Customers values (6,'Boston') insert into dbo.Customers values (7,'Philadelphia') insert into dbo.Customers values (8,'San Diego') insert into dbo.Customers values (9,'Phoenix') insert into dbo.Customers values (10,'Denver') Now execute your delete query truncate table dbo.Customers Facebook.com/wikitechy twitter.com/wikitechy © Copyright 2016. All Rights Reserved. | SQL Server Basics Code Explanation Delete the customer id =4 from the table customers. Fetch all the data from the table. We will receive data without the customer id =4. Delete top 2 customers from the table. Delete 50% of records from the table. Considering, If we got 7 records Facebook.com/wikitechy twitter.com/wikitechy © Copyright 2016. All Rights Reserved. | SQL Server Basics 50% is more than 3 right. So, 4 records will be deleted. Fetch the remaining records from the table. Facebook.com/wikitechy twitter.com/wikitechy © Copyright 2016. All Rights Reserved. .

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Insert - Sql Insert - Sql
INSERT - SQL INSERT - SQL INSERT - SQL Common Set Syntax: INSERT INTO table-name (*) [VALUES-clause] [(column-list)] VALUE-LIST Extended Set Syntax: INSERT INTO table-name (*) [OVERRIDING USER VALUE] [VALUES-clause] [(column-list)] [OVERRIDING USER VALUE] VALUE-LIST This chaptercovers the following topics: Function Syntax Description Example For an explanation of the symbols used in the syntax diagram, see Syntax Symbols. Belongs to Function Group: Database Access and Update Function The SQL INSERT statement is used to add one or more new rows to a table. Syntax Description Syntax Element Description INTO table-name INTO Clause: In the INTO clause, the table is specified into which the new rows are to be inserted. See further information on table-name. 1 INSERT - SQL Syntax Description Syntax Element Description column-list Column List: Syntax: column-name... In the column-list, one or more column-names can be specified, which are to be supplied with values in the row currently inserted. If a column-list is specified, the sequence of the columns must match with the sequence of the values either specified in the insert-item-list or contained in the specified view (see below). If the column-list is omitted, the values in the insert-item-list or in the specified view are inserted according to an implicit list of all the columns in the order they exist in the table. VALUES-clause Values Clause: With the VALUES clause, you insert a single row into the table. See VALUES Clause below. insert-item-list INSERT Single Row: In the insert-item-list, you can specify one or more values to be assigned to the columns specified in the column-list.
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Case in Insert Statement Sql
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Relational Algebra and SQL Relational Query Languages
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SQL from Wikipedia, the Free Encyclopedia Jump To: Navigation
SQL From Wikipedia, the free encyclopedia Jump to: navigation, search This article is about the database language. For the airport with IATA code SQL, see San Carlos Airport. SQL Paradigm Multi-paradigm Appeared in 1974 Designed by Donald D. Chamberlin Raymond F. Boyce Developer IBM Stable release SQL:2008 (2008) Typing discipline Static, strong Major implementations Many Dialects SQL-86, SQL-89, SQL-92, SQL:1999, SQL:2003, SQL:2008 Influenced by Datalog Influenced Agena, CQL, LINQ, Windows PowerShell OS Cross-platform SQL (officially pronounced /ˌɛskjuːˈɛl/ like "S-Q-L" but is often pronounced / ˈsiːkwəl/ like "Sequel"),[1] often referred to as Structured Query Language,[2] [3] is a database computer language designed for managing data in relational database management systems (RDBMS), and originally based upon relational algebra. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control. SQL was one of the first languages for Edgar F. Codd's relational model in his influential 1970 paper, "A Relational Model of Data for Large Shared Data Banks"[4] and became the most widely used language for relational databases.[2][5] Contents [hide] * 1 History * 2 Language elements o 2.1 Queries + 2.1.1 Null and three-valued logic (3VL) o 2.2 Data manipulation o 2.3 Transaction controls o 2.4 Data definition o 2.5 Data types + 2.5.1 Character strings + 2.5.2 Bit strings + 2.5.3 Numbers + 2.5.4 Date and time o 2.6 Data control o 2.7 Procedural extensions * 3 Criticisms of SQL o 3.1 Cross-vendor portability * 4 Standardization o 4.1 Standard structure * 5 Alternatives to SQL * 6 See also * 7 References * 8 External links [edit] History SQL was developed at IBM by Donald D.
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Sql Server Truncate All Tables in Database Logging
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Session 5 – Main Theme
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SQL Commands
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