create database in pl sql developer
Specifying Locking Hints in a SQL Server Database
Ngày tải lên :
17/10/2013, 20:15
... rows in an underlying SQL Server database.
Solution
Use SQL Server locking hints from ADO.NET.
The sample code contains three event handlers:
Start Tran Button.Click
Creates a SQL SELECT statement ... to monitor lock activity.
For more information about database locks, using locking hints, or monitoring database
locks, see Microsoft SQL Server Books Online.
[ Team LiB ]
// . . .
... according to their function.
Table 6-21. SQL Server locking hints for isolation level
Locking hint Description
HOLDLOCK
Hold a shared lock until the transaction is completed instead
of releasing...
- 5
- 417
- 0
Teach Yourself PL/SQL in 21 Days- P16
Ngày tải lên :
20/10/2013, 17:15
... creating, 54
creating (security exam-
ple), 538-539
data integrity (maintain-
ing), 300-304
listing, 302
defining, 299-300, 313,
319
delete, 296
enabling/disabling,
310-311
event, 311-312
defining, ... (dbms output.put
line() procedure), 17
processing benefits, 9
platform independence
(PL/ SQL benefits), 9
Platinum Technology Inc.
Web site, 11
PLS_INTEGER datatype,
43
syntax, 44
plus sign (+)
addition ... 266
declaring, 266-267
deleting entries, 270-
271
inserting entries into,
267-268
methods, 271-274
referencing values,
268-269
updating entries, 270
inserting rows, 226-229
employee table exam-
ple,...
- 15
- 358
- 0
Teach Yourself PL/SQL in 21 Days- P1
Ngày tải lên :
07/11/2013, 20:15
... test, and
create PL/ SQL stored subprograms and SQL queries.
F
IGURE
1.1
Relationship of
SQL* Plus, PL/ SQL,
and Oracle.
Oracle Database Server
SQL Statement
Executor
SQL* Plus
PL/ SQL
Engine
SQL
Queries
Your ... Compatibility 574
Using the
OUT
and
IN OUT
Arguments 575
Calling PL/ SQL from Java Using SQLJ 578
Using SQLJ to Execute an Anonymous PL/ SQL Block 578
Using SQLJ to Call a PL/ SQL Procedure or Function ... using the SQL* Plus
@
command.
ãUse the SQL* Plus
EDIT
command.
The first method involves running Windows Notepad, typing your PL/ SQL code (or SQL
queries) into it, and then copying and pasting from...
- 50
- 367
- 0
Teach Yourself PL/SQL in 21 Days- P2
Ngày tải lên :
07/11/2013, 20:15
... longer
strings in PL/ SQL, but 4000 is the limit (2000 if you are using any release of
Oracle7) if you want to store the string in the database.
Note
Referring to the example declaration of
employee_name
, ... block begins at line 3 and ends on line 31. A
nested anonymous block begins on line 14 and ends on line 21. Lines 6 through 9 define
the
name_print
procedure.
The variable
a_name
is declared in the ... three-day weekend. The
test in line 16 also includes Saturday and Sunday because many employers still give
employees a day off, resulting in a three-day weekend. Line 24 uses PL/ SQL s
ADD_MONTHS
function...
- 50
- 361
- 0
Teach Yourself PL/SQL in 21 Days- P3
Ngày tải lên :
07/11/2013, 20:15
... When I am comparing strings, especially when comparing a
CHAR
string to a
VARCHAR2
string, is there a convenient way to tell PL/ SQL to ignore any trail-
ing spaces in the
CHAR
string?
A Yes. Use ... For example, in line 13, the concatenation operator is used to create a string
expression that is passed as input to the
PUT_LINE
procedure.
Using Comparison Operators with Strings
You can use ... longer string and then does the comparison. Trailing spaces alone
will not result in any differences being found between two springs. Oracle also does the
same thing when comparing two string constants....
- 50
- 334
- 0
Tài liệu Specifying Locking Hints in a SQL Server Database doc
Ngày tải lên :
14/12/2013, 18:16
... according to their function.
Table 6-21. SQL Server locking hints for isolation level
Locking hint Description
HOLDLOCK
Hold a shared lock until the transaction is completed instead
of releasing ... Windows Performance Monitor has a SQL Server Locks Object counter that
can be used to monitor lock activity.
For more information about database locks, using locking hints, or monitoring database ... get information about database locks:
ã
The system stored procedure sp_lock returns a result set containing all active
locks.
ã
The syslockinfo table in the master database contains information...
- 5
- 540
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P4 pptx
Ngày tải lên :
15/12/2013, 05:15
... about using this example as a PL/ SQL procedure and returning to the good old days
of BC? Listing 6.9 shows another example of using
TO_CHAR
with converting and format-
ting dates.
L
ISTING
6.9
Converting
DATE
to ...
Jumping into a Lower-Level Block
You can’t jump from an outer block of PL/ SQL code back to an inner block of PL/ SQL
code. Listing 5.1 is an example of an illegal
GOTO
call.
The following listing, ... must be within the same scope as the
GOTO
statement itself. Conditions that cause Oracle to not compile the PL/ SQL code
include
ãJumping into a subblock
ãJumping into a loop
ãJumping into an
IF
statement
ãUsing
GOTO
to...
- 50
- 392
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P5 doc
Ngày tải lên :
15/12/2013, 05:15
... the SQL* Plus prompt.
The code in Listing 7.2 illustrates the
PUT_LINE
command line that you can include
inside a procedure.
L
ISTING
7.2
The
PUT_LINE
Command Within a Procedure
CREATE OR REPLACE ... D
AY
8
W
EEK
2
Using SQL
by Tom Luers
By definition, PL/ SQL is SQL s procedural language extension. PL/ SQL sup-
ports all SQL s data manipulation commands (except for
EXPLAIN PLAN
), trans-
action ... you learned
in Week 1 and learn more complex methods of using them. In
this second week, you will begin to integrate your PL/ SQL
code with the Oracle database. You will create some sample
tables...
- 50
- 292
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P6 docx
Ngày tải lên :
15/12/2013, 05:15
... 1
Key: employee name
emp. number
Listing 8.4 shows the PL/ SQL anonymous block that you can run to insert the necessary
data.
L
ISTING
8.4
Inserting Records with PL/ SQL Code
DECLARE insert department ... that are not used.
Listing 10.1 shows the entire contents of the
employee
table being read into an index-by
table named
emp
.
L
ISTING
10.1
Placing Employee Records in an Index-by Table
1: DECLARE
2: ... containing any of the
following:
OPEN stock_listing_cur (stock_listing.name, ‘ABCDEFG’);
OPEN stock)listing_cur (stock_listing_name, stock_listing_price);
Fetching Data in a Cursor
You get data into...
- 50
- 410
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P7 ppt
Ngày tải lên :
15/12/2013, 05:15
... trigger.
Lines 17–19 define a record containing the primary key fields for the
emp_dept
table.
This record in turn is used to define a PL/ SQL table type (lines 23–24). Finally, in line
27, a PL/ SQL ... central point of con-
trol for maintaining the number of employees in a department, and they relieve you from
having to program and test this logic several places in your application.
Maintaining ... imagina-
tion. Some common uses are
ã Enforcing business rules
ã Maintaining referential integrity
ã Enforcing security
ã Maintaining a historical log of changes
ã Generating column values, including...
- 50
- 368
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P8 pptx
Ngày tải lên :
15/12/2013, 05:15
... within a SQL
statement. In fact, the statement in question was executed from within SQL* Plus,
although it could have been inside a PL/ SQL block. Lines 12-22 show a PL/ SQL block
that first instantiates ... (SELF IN building,
8: OtherBuilding IN building)
9: RETURN INTEGER
10: );
11: /
12: CREATE OR REPLACE TYPE BODY building AS
13: MEMBER PROCEDURE ChangeMgr(SELF IN OUT building,
14: NewMgr IN INTEGER) ... in Listing 12.8 in order to insert a few
building
objects.
These will be used in later examples that show how to update object tables and how to
link objects in the database.
L
ISTING
12.8
Inserting...
- 50
- 360
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P9 doc
Ngày tải lên :
15/12/2013, 05:15
... READ(BLOB_Locator,
Read_Amount IN BINARY_INTEGER,
Starting_Location IN INTEGER,
Buffer OUT RAW);
PROCEDURE READ(CLOB_Locator CHARACTER SET Set_Desired,
Read_Amount IN BINARY_INTEGER,
Starting_Location IN INTEGER,
Buffer ... exam-
ple of the syntax for the
COMPARE
function can be seen below.
FUNCTION COMPARE(
Lob1 IN BLOB,
Lob2 IN BLOB,
Number_Bytes_to_Compare IN INTEGER,
Origin_Lob1 IN INTEGER := 1,
Origin_Lob2 IN INTEGER ... Compare_Result_Integer;
FUNCTION COMPARE(
Lob1 IN CLOB CHARACTER SET Set_Desired,
Lob2 IN CLOB CHARACTER SET LOB1%CHARSET,,
Number_Bytes_to_Compare IN INTEGER,
Origin_Lob1 IN INTEGER := 1,
Origin_Lob2 IN INTEGER...
- 50
- 347
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P10 docx
Ngày tải lên :
15/12/2013, 05:15
... can simply issue a PL/ SQL
EXECUTE IMMEDIATE
statement.
EXECUTE IMMEDIATE string
[INTO {variable[, variable] | record}]
[USING [IN | OUT | IN OUT] bind
[, [IN | OUT | IN OUT] bind] ];
In this ... native
dynamic SQL in the remaining part of this lesson.
Note
Executing DML and DDL
Executing DML and DDL statements is quite easy using native dynamic SQL. Instead of
making all those calls to
DBMS _SQL
, ...
DBMS _SQL. NATIVE
,
DBMS _SQL. V7
,and so on.
DBMS _SQL. NATIVE
is usually the best choice.
Binding Input Variables
Binding enables you to associate a specific variable to a placeholder in your SQL
statement....
- 50
- 355
- 0
Tài liệu Teach Yourself PL/SQL in 21 Days- P11 docx
Ngày tải lên :
15/12/2013, 05:15
... the interval (system date executing every minute). You can
compute this by multiplying 24 hours in the day by 60 minutes/hour by 60 seconds/
minute, and then taking the inverse.
The next example ... seen in the following example.
PROCEDURE SUBMIT(job_number OUT BINARY_INTEGER,
job_to_submit IN VARCHAR2,
next_run IN DATE DEFAULT SYSDATE,
interval IN VARCHAR2 DEFAULT NULL,
job_parsing IN BOOLEAN ... watermark.
Writing to Files and the Display 491
17
GET_LINES
occurs in lines 32–34. The
lines_to_get
parameter contains the value
3
,
telling
GET_LINES
to return all three names. The loop in line 40–43...
- 50
- 309
- 0