Beginning T-SQL 2012 by Scott Shaw, Kathi Kellenberger (auth.)

By Scott Shaw, Kathi Kellenberger (auth.)

Beginning T-SQL 2012 is step one towards studying the T-SQL language that underlies Microsoft’s SQL Server database engine. T-SQL is vital in writing SQL statements to get information into and out of a database. T-SQL is the basis for enterprise good judgment embedded within the database within the type of kept methods and features. Beginning T-SQL 2012 starts off you at the route to gaining knowledge of T-SQL, with an emphasis on top practices and sound coding techniques.

Beginning T-SQL 2012 begins with an creation to databases, normalization, and to SQL Server administration Studio. each one next bankruptcy teaches a facet of T-SQL, construction at the abilities discovered in prior chapters. routines in each one bankruptcy supply readers a chance for the hands-on perform that results in precise studying and distinguishes the useful professional.

  • Imparts most sensible practices for writing T-SQL
  • Helps you keep away from universal blunders
  • Shows the best way to write scalable code for reliable functionality

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R Ootoil' 1::1 / * I want to comment serveral lines like this [ */ BSELECT 1 -- a comment after the code - - I want to comment 1 line Figure 1-26. Commented code The Object Explorer allows you to manage the databases, security, maintenance jobs , and other aspects ofSQL Server. Most of the tasks that can be performed are in the realm of database administrators, so we will not explore them in this book. Exploring Database Concepts In this section, you will learn just what SQLServer is and about the databases and objects that make up databases.

39 CHAPTER 2 • WRITING SIMPLESELECTQUERIES Mixing Literals and Column Names You can mi x literal values an d colu m n n ames in one sta te ment. Listing 2-4 shows an exam ple. SQL Server allows you to create or rename a column within a qu ery by using what is known as an alias. You u se the keyword AS to specify an alias for the colum n . This is especially u seful whe n using liter al values whe re you create a colum n n ame in the T-SQL state men t that do esn't exist in the tabl e. Listing 2-4.

Employee table, and right -click it. Select the Design option to view the properties (see Figure 1-29). ~~~ NationalIDNumber Data Type Allow Nulls .. . 1 int nvarchar(15) Log inlD nvarchar(256) OrganizationNode hierarchyid OrganizationLevel JobTitle nvarchar(50) BirthDate date MaritalStatus nchar(1) Gender nchar(1) HireDate date Sala riedFlag Flag:bit VacationHours smallint SickLeaveHours smallint CurrentFlag Flag:bit rowguid uniqueidentifier ModifiedDate datetime Figure 1-29. Employee table The HumanResources .

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