Solution Guide for Migrating Oracle on UNIX to SQL Server - Willy .Net

188 Developing: Applications — <strong>Migrating</strong> <strong>Oracle</strong> SQL and PL/SQLfirst parameter is datatype. The second parameter is <strong>for</strong> the column to be <strong>for</strong>matted. Thethird parameter is the desired <strong>for</strong>mat. Please see the list of <strong>for</strong>mats and thecorresponding <strong>for</strong>mula in Table 11.16.Table 11.16: CONVERT Function Formats in SQL ServerWITH CENTURY (YYYY)INPUT/OUTPUT0 OR 100 (*) MON DD YYYY HH:MIAM (OR PM)101 MM/DD/YY102 YY.MM.DD103 DD/MM/YY104 DD.MM.YY105 DD-MM-YY106DD MON YY107 MON DD, YY108 HH:MM:SS9 OR 109 (*)DEFAULT + MILLISECONDS110MON DD YYYY HH:MI:SS:MMMAM (ORPM)MM-DD-YY111 YY/MM/DD112 YYMMDD13 OR 113 (*) DD MON YYYY HH:MM:SS:MMM(24H)114 HH:MI:SS:MMM(24H)20 OR 120 (*) YYYY-MM-DD HH:MI:SS(24H)21 OR 121 (*) YYYY-MM-DD HH: MI: SS.MMM (24H)130* DD MON YYYY HH:MI:SS:MMMAM131* DD/MM/YY HH:MI:SS:MMMAMConditional FunctionsConditional functions are used to compare values or to evaluate a Boolean expression.Table 11.17 compares these functions between <strong>Oracle</strong> and SQL Server.Table 11.17: Conditional Functions in <strong>Oracle</strong> and SQL<strong>Oracle</strong> Description <strong>Oracle</strong> SQL Server SQL ServerFunction Example Function ExampleNVL To return a NVL (SALARY, ISNULL ISNULLdefault value if 0) returns 0 if(SALARY, 0)the expression the column returns 0 if theis nullvalue (SALARYcolumn) is nullcolumn value(SALARYcolumn) is nullNVL2 To return a NVL2 (Salary, CASECASE SALARYvalue if the Salary*2, 0) WHEN nullexpression isnull or nullreturns twotimes thesalary if not nulland 0 if nullTHEN 0ELSESALARY*2END