By Scott Shaw, Kathi Kellenberger (auth.)
Beginning T-SQL 2012 is step one towards studying the T-SQL language that underlies Microsofts SQL Server database engine. T-SQL is vital in writing SQL statements to get info into and out of a database. T-SQL is the basis for enterprise good judgment embedded within the database within the type of saved methods and services. Beginning T-SQL 2012 begins you at the route to getting to know 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 talents discovered in past chapters. workouts 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 stay away from universal error
- Shows the best way to write scalable code for sturdy functionality
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When searching on Google, you will probably have to click the link to view the original page . If all the information you need is included in the index, you have no need to visit the actual data. Although you can have only one clustered index per table, you can have up to 999 nonclustered indexes per table . If you ever need that many, you might have a design problem! An important thing to keep in mind is that although indexes can improve the performance of queries, indexes take up disk space and require resources to maintain.
Notice th e column nam es in your res ults. The co lumn names are th e aliases th at you specified in your query. You ca n alias any colu m n, giving you com plete control over the h ead er s for your result sets. orks barisD Figure 2-4. The results ofusing aliases 40 CHAPTER2 • WRITINGSIMPLESELECT QUERIES The keyword AS is optional. You can specify an alias name immediately following a column name. If an alias contains a space or is a reserved word, you can surround the alias with square brackets, single quotes, or doubl e quotes.
QPROCESS. QOBJECT. QAPPSERV. Q\VI~TA trOlTl Cdru\,'I""tr~m e. '" O'oso~ 1%592 Quory HmU (Tr. MJlt bffW\')()f' of 1". ry ~ mid mcrO$Ortc;omI·u I'Y l"Itd817 14MPJ Qu. tum dlt.. t~l tNtd"lItS.. l for h,lmphe . us, rK,'Y "2S6n8~ Quory Schem. Thf Query Khe-rNo! Qu. MC Figure 1-16. Search results in Microsoft Help Viewer Once you find an article or help topic you think you will want to view periodically, you can click the "Add to Favorites " button as you would for any other web site . You will learn how to write T-SQL from reading this book, but I recommend that you check Books Online frequently to learn even more!