By Morris Lewis

ISBN-10: 1590592190

ISBN-13: 9781590592199

SQL Server is the dominant relational database within the home windows industry and information safeguard is a big and turning out to be predicament for all companies. Securing SQL Server is likely one of the most crucial tasks of the SQL Server professional.

SQL Server Distilled, moment variation is a truly conscientiously researched, sincerely defined publication on securing SQL Server, via an writer who understands SQL Server in and out. should you keep on with the sensible directions which are sincerely set out during this publication, you then stand a great probability of creating convinced that the knowledge kept on your database is safe and that the dialog among your functions and the database is safe (preventing SQL injection assaults, etc.). for instance, any DBA who applied the safety precautions distinct within the booklet wouldn't have been laid low with the notorious Slammer virus.

This moment version deals useful recommendation on easy methods to enforce strong practices that may chase away destiny viruses ahead of they're even created, and it includes new content material that displays all updates to SQL Server's safety mechanisms.

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3-4. Looking for NULLs in a Table Problem You have a table with a nullable column. You would like to return rows where that column is NULLor where the column is not NULL. Solution The first hurdle to overcome when working with NULLs is to remove this WHERE clause from your mind: WHERE SomeColumn = NULL. The second hurdle is to remove this clause: WHERE SomeCol <> NULL. NULL is an “unknown” value. Because the value is unknown, SQL Server cannot evaluate any operator where an input to the operator is unknown.

The corresponding result is then returned. If none of the expressions evaluates as true, then the optional ELSE value is returned. The ability to evaluate Boolean expressions of arbitrary complexity in this flavor of CASE provides additional flexibility above the simple CASE expression from the previous recipe. 2-6. Writing a WHILE Statement Problem You want to write a WHILE statement to execute a block of code so long as a given condition is true. Solution Write a WHILE statement using the following example as a template.

It is the BusinessEntityID that identifies a person. That same ID identifies the phone numbers for a person. For this example, you want all combinations of Person and PersonPhone rows sharing the same value for BusinessEntityID. BusinessEntityID Specify the columns you wish to see in the output. All columns from both tables are available. BusinessEntityID; The ORDER BY clause sorts the results so that all phone numbers for a given person fall together. Results are as follows: BusinessEntityID ---------------- 285 293 38 295 2170 211 2357 297 … FirstName ---------- Syed Catherine Kim Kim Kim Hazem Sam Humberto LastName ------------ Abbas Abel Abercrombie Abercrombie Abercrombie Abolrous Abolrous Acevedo PhoneNumber ------------926-555-0182 747-555-0171 208-555-0114 334-555-0137 919-555-0100 869-555-0125 567-555-0100 599-555-0127 How It Works The inner join is one of the most fundamental operations to understand.

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SQL Server Security Distilled by Morris Lewis

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