0 - This is a modal window. No compatible source was found for this media. PL/SQL Program Units A PL/SQL unit is any one of the following − PL/SQL block Function Package Package body Procedure Trigger Type Type body Each of these units will be discussed in the following chapters. ...
operators: symbols that requesta comparisona logical operationan arithmetic calculationand sas funciinsNote do 开头一定 end 结尾 select 语句 select<(select-expression)>;when-1(when-expresssion-1)<...when-exprssion-n>)statement;<...when-n(when-expression-1)<...n>)statement;><otherwise ...
Query Operators Expression Trees Sample LINQ Provider In the June 2007 issue ofMSDN® Magazine, Kit George and Ting Liang provided anintroductionto some of the new features being introduced in Visual Basic® 9.0 to support Language Integrated Query, or LINQ. In particular, they showed how LINQ...
DBMS security. The encryption aimed at DBMS security refers to the encryption and decryption of data in the process of reading and writing data by means of custom functions or built-in system functions, involving database encryption, data access control , security auditing, and data backup.To su...
Oracle lets you derive datetime and interval value expressions. Datetime value expressions yield values of datetime datatype. Interval value expressions yield values of interval datatype. Table 2-5 lists the operators that you can use in these expressions....
Unless the required conversion itself is low-level, you should use one of the other cast operators. Allows conversion of any pointer to any other pointer type (such as char * to int * or One_class * to Unrelated_class *, but it is not itself safe) Also allows conversion of any ...
Basic_course_shortcut Basic Computer Training Course (Designed for the school teachers of BCICT Programme implemented Schools)This book covers the following courses:✓Introduction to computer ✓Computer History ✓Windows OS ✓MS-Word 2000/XP ✓MS-Excel 2000/XP ✓MS-Power Point ...
He had noticed that desktop PCs would survive at least for a bedrock market segment, composed by users who didn't want to or could not switch to another device: "the anti-mobility crowd (operators of desktop pools for task workers), those who wanted the modularity of desktops (the white ...
Rule 7 :High-level insert, update, and delete: The system must support set-at-a-time insert, update, and delete operators. This means that data can be retrieved from a relational database in sets constructed of data from multiple rows and/or multiple tables. This rule states that insert,...
Finally, because the Access Engine does not support Clipper index files (NTXs), A.S. Inc. (Minot, North Dakota) has created vxBase 3.0--a shareware function library for VB or C/C++ programmers. vxBase includes a number of functions, expressions, and operators whose syntax is similar to ...