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PL/SQL User’s Guide and Reference phần 1 pdf
... PL/SQL
User’s Guide and Reference
Release 8 .1. 6
December 19 99
Part No. A77069- 01
xiii
SQL Cursor 11 -16 3
SQLCODE Function 11 -16 6
SQLERRM Function 11 -16 8
%TYPE Attribute 11 -17 0
UPDATE Statement 11 -17 2
A ... 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 G...
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... value into a
VARCHAR2 variable.
Declarations
2- 30 PL/SQL User’s Guide and Reference
A conversion is also necessary when you insert a CHAR or VARCHAR2 value into a
DATE column. So, PL/SQL calls the ... 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 varia...
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... name = ’History’)
WHERE course_no = 31 05;
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. ... History’, 5),
Course(2 130 , ’The Renaissance’, 3) ,
Course(2 132 , ’The Reformation’, 3) ,
Course (31 05, ’History of Ancient Greece’, 4),
Course (33 21, ’Early Japan’, 4),...
PL/SQL User’s Guide and Reference phần 4 pptx
... Application Developer’s
Guide - Fundamentals.
Processing Transactions
5 -44 PL/SQL User’s Guide and Reference
Using ROLLBACK
The ROLLBACK statement ends the current transaction and undoes any changes
made ... Transactions
5- 54 PL/SQL User’s Guide and Reference
In the following example, you mark a PL/SQL block as autonomous:
DECLARE
PRAGMA AUTONOMOUS_TRANSACTION;...
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... 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 ... EXCEPTION_INIT(deadlock_detected, -60);
Understanding Parameter Aliasing
7-22 PL/SQL User’s Guide and Reference
Understanding Parameter Aliasing
To optimize a subprogram ca...
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... 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
9-20 PL/SQL User’s Guide and Reference
Object Type
Rational
A rational number is a number expressible as the quotient of two integers, a
numerator and...
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... 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
key...
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... 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 th...
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... 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 ... MODE;
Related Topics
COMMIT Statement, ROLLBACK Statement
RESTRICT_REFERENCES Pragma
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RESTRICT_REFERENCES Pragma
To be calla...
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... printf("\n\n");
printf("% -10. 10s% -10. 10s%s\n", "Employee", "Job", "Salary");
printf("% -10. 10s% -10. 10s%s\n", " ", " ", ... EXISTS (SELECT * FROM tab2 WHERE col2 = 10) ;
BEGIN
END;
Sample 5. Embedded PL/SQL
A-12 PL/SQL User’s Guide and Reference
printf("\n\n\tEmbedded PL/SQL Debit Tr...
PL/SQL User''''s Guide and Reference 10g Release phần 1 pdf
... Attribute 13 -11 9
SAVEPOINT Statement 13 -12 1
SCN_TO_TIMESTAMP Function 13 -12 2
SELECT INTO Statement 13 -12 3
SERIALLY_REUSABLE Pragma 13 -12 7
PL/SQL User's Guide and Reference, 10 g Release 1 (10 .1)
Part ... Statement 13 -95
OPEN-FOR-USING Statement 13 -97
Packages 13 -99
Procedures 13 -10 4
RAISE Statement 13 -10 8
Records 13 -11 0
RESTRICT_REFERENCES P...
PL/SQL User''''s Guide and Reference 10g Release phần 2 doc
... SQL
PL/SQL Expressions and Comparisons
2- 20 PL/SQL User's Guide and Reference
When the value of on_hand is zero, the left operand yields TRUE, so PL/SQL does not
evaluate the right operand. ... assignments */
IF 2 + 2 = 4 THEN
some_condition := TRUE; /* We expect this THEN to always be done */
PL/SQL Expressions and Comparisons
2- 26 PL/SQL User's Gui...
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... v2 ntb1;
v3 ntb2;
v4 tb1;
v5 tb1; empty table
begin
v4(1) := 34 ;
v4(2) := 46456;
v4(456) := 34 3;
v2( 23) := v4;
v3 (34 ) := va1 (33 , 456, 656, 34 3);
What Is a PL/SQL Record?
5 -32 PL/SQL User's ... Collection Exceptions
5 -30 PL/SQL User's Guide and Reference
n NumList := NumList(10,20 ,30 ,40,50,60,70,80,90,100);
TYPE NickList IS TABLE OF VARCHAR2(64) I...
PL/SQL User''''s Guide and Reference 10g Release phần 4 pptx
... DELETE, and SELECT statements directly in
PL/SQL, PL/SQL turns the variables into bind variables automatically, to make the
Guidelines for Dynamic SQL
7-12 PL/SQL User's Guide and Reference
Avoiding ... Overview of Transaction Processing in PL/SQL
6- 34 PL/SQL User's Guide and Reference
about lock modes, see Oracle Database Application Developer's Guid...
PL/SQL User''''s Guide and Reference 10g Release phần 10 ppt
... 10- 4
propagation, 10- 10
raised in declaration, 10- 13
raised in handler, 10- 14
raising with RAISE statement, 10- 9
reraising, 10- 12
scope rules, 10- 6
syntax, 13-45
user-defined, 10- 6
WHEN clause, 10- 13
executable ... exception handler, 10- 14
label, 4-12
syntax, 13-71
GROUP BY clause, 6-2
H
handlers, exception, 10- 2
handling exceptions, 10- 1
raised in declaration, 10- 13...