1. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 1

2. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 2

3. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 3

4. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 4 Batches and the GO command

5. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 5 GO To signal the end of a batch, you use the GO command. A GO command isn’t required after the last batch in a script or for a script that contains a single batch.

6. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 6

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13. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 13 Concatenation, cast, convert

14. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 14 Concatenation ( + ) The SQL standard uses || for concatentation Sql Server TSql uses + for concatenation Example: SELECT fname + ' ' + lname as name FROM employees

15. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 15 operands must be character data In SQL Server - TSql... concatenation MUST take two character values (varchar, char, nchar, etc) as its operands Neither parameter can be numeric or date types The following WILL cause an ERROR (if salary is a money column) SELECT fname + salary FROM employees

16. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 16 cast Use the SQL standard "cast" operator to convert data from one datatype into another The following WILL work: SELECT fname + cast(salary as varchar(10)) FROM employees

17. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 17 convert You can use the TSQL "convert" function instead of cast. The following is equivalent to the previous example: SELECT fname + convert(varchar(10), salary) FROM employees

18. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 18 Difference between CAST and CONVERT differences –standards CAST is a standard CONVERT is TSQL specific –extra functionality CONVERT has one additional piece of functionality that CAST does not have see next slide

19. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 19 Convert (type, data, style) Convert takes an optional 3rd (integer) parameter that determines the "style" (AKA format) of the data after the cast. If the data is a money value then format has the following possible values: 0 - no commas, two decimal points 1 - yes commas, two decimal points 2 - no commas, four decimal points

20. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 20 styles for dates, float, real See the following URL: –http://doc.ddart.net/mssql/sql70/ca-co_1.htm

21. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 21 TSQL statements

22. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 22 USE statement USE –The use statement switches a script to use the specified database. –A single script can work in more than one database by issuing the use statement several times

23. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 23 PRINT statement PRINT –Prints out the value of the string expression.

24. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 24 Variables

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33. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 33 Table Variables

34. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 34 Scalar vs. table variables AThe variables that we've seen so far can hold a single data item and is defined with a standard data type. These are called scalar variables. A variable that can hold an entire table is called a "table variable" (see next slide...)

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38. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 38 Derived tables

39. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 39 Derived Tables The term "Derived Table" is simply a table that is created as the result of a subquery in the FROM clause.

40. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 40 Temporary Tables

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47. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 47 IF BEGIN... END ELSE BEGIN... END

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52. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 52 DB_ID OBJECT_ID

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57. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 57 WHILE

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61. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 61 SYSTEM FUNCTIONS (AKA global variables)

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65. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 65 Session settings and the SET command

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69. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 69 Dynamic SQL and the EXEC command

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79. SQL for SQL Server, C13© 2002, Mike Murach & Associates, Inc. Slide 79 OSQL

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