PL/SQL User’s Guide and Reference phần 9 doc
PL/SQL User’s Guide and Reference phần 9 doc
... SERIALLY_REUSABLE ;
LOOP Statements
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Internally, PL/SQL assigns the values of the bounds to temporary PLS_INTEGER
variables, and, if necessary, rounds the values ... MODE;
Related Topics
COMMIT Statement, ROLLBACK Statement
RESTRICT_REFERENCES Pragma
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RESTRICT_REFERENCES Pragma
To be callabl...
PL/SQL User’s Guide and Reference phần 2 doc
... 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 easier to read and understand. ... 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 a...
PL/SQL User’s Guide and Reference phần 6 docx
... 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, ... Types
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Object Type
Rational
A rational number is a number expressible as the quotient of two integers, a
numerator and...
PL/SQL User’s Guide and Reference phần 1 pdf
... 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...
PL/SQL User’s Guide and Reference phần 3 pdf
... course_no = 3105;
END;
Taking Advantage of Bulk Binds
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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, it...
PL/SQL User’s Guide and Reference phần 4 pptx
... Variables
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Cursor variables follow the usual scoping and instantiation rules. Local PL/SQL
cursor variables are instantiated when you enter a block or subprogram and ... cursor variable and pass it as a parameter to
local and stored subprograms. This gives you an easy way to centralize data
retrieval.
Using Cursor Variables
5-22 PL/SQ...
PL/SQL User’s Guide and Reference phần 5 ppsx
... subprogram.
You can avoid unhandled exceptions by coding an OTHERS handler at the topmost
level of every PL/SQL program.
User-Defined Exceptions
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BEGIN
IF THEN
... EXCEPTION_INIT(deadlock_detected, -60);
Understanding Parameter Aliasing
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Understanding Parameter Aliasing
To optimize a subprogra...
PL/SQL User’s Guide and Reference phần 7 ppt
... list.
Tips and Traps
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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
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Blocks
The basic program unit in PL/SQL is the block. A PL/SQL block is defined by the
keywo...
PL/SQL User’s Guide and Reference phần 8 pptx
... 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 current block, a GOTO statement ... page 11- 19.
exponent
This is an expression that must yield a numeric value.
FORALL Statement
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FORALL Statement
The FORALL statement...
PL/SQL User’s Guide and Reference phần 10 ppsx
... NEW_VALUE STATUS TIME_TAG
-
3 u 599 18-NOV-88
6 i 20 099 18-NOV-88
5 d 18-NOV-88
7 u 1 599 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 ... VARCHAR2 variable, PL/SQL aborts the assignment and
raises VALUE_ERROR.
Note:
The same rules apply when fetching.
Sample 6. Calling a Stored Procedure
A-16 PL/SQL User’s Guide and...
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