PL/SQL User’s Guide and Reference phần 8 pptx

... expression AND expression IN ( expression , ) other_boolean_form Functions 11 -86 PL/SQL User’s Guide and Reference datatype This is a type specifier. For the syntax of datatype, see "Constants and ... operator returns the Boolean value TRUE if its operand is null, or FALSE if its operand is not null. GOTO Statement 11-90 PL/SQL User’s Guide and Reference From the...

Ngày tải lên: 07/08/2014, 11:22

... Variables 5- 18 PL/SQL User’s Guide and Reference Cursor variables follow the usual scoping and instantiation rules. Local PL/SQL cursor variables are instantiated when you enter a block or subprogram and ... Oracle8i Application Developer’s Guide - Fundamentals. Processing Transactions 5-44 PL/SQL User’s Guide and Reference Using ROLLBACK The ROLLBACK statement e...

Ngày tải lên: 07/08/2014, 11:22

... not grant them access to the table itself. Advantages of PL/SQL 1-24 PL/SQL User’s Guide and Reference Main Features 1-10 PL/SQL User’s Guide and Reference Iterative Control LOOP statements let you ... this guide. For that kind of information, see the Oracle installation or user’s guide for your system. How This Guide Is Organized The PL/SQL User’s Guide an...

Ngày tải lên: 07/08/2014, 11:22

... of EXIT statements: EXIT and EXIT-WHEN. Scope and Visibility 2- 38 PL/SQL User’s Guide and Reference In such cases, to avoid ambiguity, prefix the names of local variables and formal parameters with ... LOOP and EXIT Statements 3-6 PL/SQL User’s Guide and Reference When possible, use the ELSIF clause instead of nested IF statements. That way, your code will be easi...

Ngày tải lên: 07/08/2014, 11:22

... course_no = 3105; END; Taking Advantage of Bulk Binds 4-30 PL/SQL User’s Guide and Reference Each context switch between the PL/SQL and SQL engines adds to overhead. So, if many switches are ... seat_not_available THEN END; Using the BULK COLLECT Clause 4- 38 PL/SQL User’s Guide and Reference The SQL engine initializes and extends collections for you. (However,...

Ngày tải lên: 07/08/2014, 11:22

... subprogram. You can avoid unhandled exceptions by coding an OTHERS handler at the topmost level of every PL/SQL program. User-Defined Exceptions 6 -8 PL/SQL User’s Guide and Reference BEGIN IF THEN ... For more information, see Oracle8i SQL Reference. Understanding Procedures 7-4 PL/SQL User’s Guide and Reference The optional CREATE clause lets you create stand-al...

Ngày tải lên: 07/08/2014, 11:22

... 6 and 8 to attributes num and den, respectively. DECLARE r Rational; BEGIN r := Rational(6, 8) ; DBMS_OUTPUT.PUT_LINE(r.num); prints 6 What Is an Object Type? 9-4 PL/SQL User’s Guide and Reference Next, ... divby; END; What Is a Package? 8- 2 PL/SQL User’s Guide and Reference What Is a Package? A package is a schema object that groups logically related PL/SQL...

Ngày tải lên: 07/08/2014, 11:22

... list. Tips and Traps 10-16 PL/SQL User’s Guide and Reference Tips and Traps Native Dynamic SQL 10-11 Tips and Traps This section shows you how to take full advantage of dynamic SQL and how to avoid ... ; assignment_statement Blocks 11-10 PL/SQL User’s Guide and Reference Blocks The basic program unit in PL/SQL is the block. A PL/SQL block is defined by the keywo...

Ngày tải lên: 07/08/2014, 11:22

... SERIALLY_REUSABLE ; LOOP Statements 11-106 PL/SQL User’s Guide and Reference Internally, PL/SQL assigns the values of the bounds to temporary PLS_INTEGER variables, and, if necessary, rounds the values ... follow: ’$5,000’ ’02-AUG -87 ’ ’Don’’t leave without saving your work.’ Related Topics Constants and Variables, Expressions LOOP Statements 11-104 PL/SQL User’s Guide...

Ngày tải lên: 07/08/2014, 11:22

... NEW_VALUE STATUS TIME_TAG - 3 u 599 18- NOV -88 6 i 20099 18- NOV -88 5 d 18- NOV -88 7 u 1599 18- NOV -88 1 i 399 18- NOV -88 9 d 18- NOV -88 10 x 18- NOV -88 PL/SQL Block available online in file ... KING 783 9 5000 SCOTT 7 788 3000 FORD 7902 3000 JONES 7566 2975 BLAKE 76 98 285 0 CLARK 7 782 2450 ALLEN 7499 1600 TURNER 784 4 1500 MILLER 7934 1300 WARD 7521 1250 MARTIN 7...

Ngày tải lên: 07/08/2014, 11:22