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Teach yourself SQL in 21 days
Ngày tải lên :
06/08/2013, 17:39
... SELECT into your system, you might get
the following response:
INPUT:
SQL> SELECT;
OUTPUT:
SELECT
*
ERROR at line 1:
ORA-00936: missing expression
The asterisk under the offending line indicates ... powerful calculations in a SELECT statement.
Modulo (%)
The modulo operator returns the integer remainder of the division operation. Using the
table REMAINS, type the following:
INPUT:
SQL> SELECT ... Molding the Data You Retrieve
Day 5 Clauses in SQL
Day 6 Joining Tables
Day 7 Subqueries: The Embedded SELECT Statement
Week 1 in Review
Week 2 at a Glance
Day 8 Manipulating Data
Day 9 Creating...
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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, ... 143
loops, 121
CURSOR FOR, 254
debugging, 136
FOR, 121- 122, 146
common errors, 124
EXIT statement, 140
listing, 121
nesting, 121
guidelines, 147
incrementing through,
123-124
listing, 123
infinite, ... 281
adding\removing data,
283-284
declaring, 282-283
variables
binding, 455
queries, 461
BLOB, initializing, 160
CLOB, initializing, 160
cursors, 257-261
as arguments, 260-261
assigning, 260
declaring,...
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Contents i What’s New with This Edition Teach Yourself ANSI C++ in 21 Days, Premier Edition, is
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20/10/2013, 17:15
... Yourself ANSI C++ in 21 Days, Premier Edition, is a new edition of the
international bestseller, Teach Yourself C++ in 21 Days. This Premier Edition offers
more than just 21 days of learning ANSI/ISO ... Member Functions of
cin
480
Single Character Input 480
Getting Strings from Standard Input 482
Using
cin.ignore()
485
peek()
and
putback()
486
Output with
cout
487
Flushing the Output 487
Related ... paradigm used in C programming and
start thinking in objects.
Where You Are Going
The first week covers the material you need to get started with programming in general, and
with C++ in particular....
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Teach Yourself PL/SQL in 21 Days- P1
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... 99
5Implementing Loops and
GOTO
s 127
6Using Oracle’s Built -In Functions 155
7Procedures, Packages, Errors, and Exceptions 189
W
EEK
1 In Review 217
W
EEK
2 At a Glance 219
8Using SQL 221
9 Manipulating ... Entries into an Index-by Table 267
Referencing Values in an Index-by Table 268
Changing Table Entries 270
Deleting Table Entries 270
PL/SQL Table Methods 271
Using Nested Tables 274
Declaring a ... generated line
numbers and the listing line numbers, the listings have been edited to show only one set
of line numbers.
For example, when typing in a simple PL/SQL block, SQL*Plus would generate line
numbers...
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Teach Yourself PL/SQL in 21 Days- P2
Ngày tải lên :
07/11/2013, 20:15
... 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 outermost block (see line 4), thus any nested
block, ... watermark.
Writing Declarations and Blocks 59
2
22:
23: DBMS_OUTPUT.PUT_LINE(‘Back in the main block’);
24:
25: But we cannot compile the following line because b_name
26: is not defined in this block.
27: ... successfully completed.
Line 5 begins a PL/SQL anonymous block. The
iifn
function is declared within
the scope of this outer block (see lines 8 through 21) . The keyword
BEGIN
in line
22 marks the start...
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Teach Yourself PL/SQL in 21 Days- P3
Ngày tải lên :
07/11/2013, 20:15
... typing the keyword
BEGIN
:
BEGIN
Because you are not performing anything in this function except returning a value, you
will code a
NULL
statement, which is discussed later in this lesson in ... 4.15.
L
ISTING
4.15
Nesting
FOR
Loops
BEGIN
FOR v_outerloopcounter IN 1 2 LOOP
FOR v_innerloopcounter IN 1 4 LOOP
DBMS_OUTPUT.PUT_LINE(‘Outer Loop counter is ‘ ||
v_outerloopcounter ||
‘ Inner Loop ... 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....
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Tài liệu Teach Yourself PL/SQL in 21 Days- P4 pptx
Ngày tải lên :
15/12/2013, 05:15
... (inverse) cosine of a number, expressed in radians.
ASIN
Returns the arc (inverse) sine of a number, expressed in radians.
ATAN
Returns the arc (inverse) tangent of a number (x), expressed in ... Oracle into stepping through a
FOR
loop.
The
WHILE
loop gives you more flexibility in looping, whether you are stepping
through a loop or even executing a loop. Listing 5.9 demonstrates stepping ...
CHAR
or
VARCHAR2
string into a
DATE
value.
TO_LABEL
Converts a
CHAR
or
VARCHAR2
string into a
MLSLABEL
.
TO_MULTI_BYTE
Converts any single-byte string of characters into a multibyte string.
TO_NUMBER
Converts...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P5 doc
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15/12/2013, 05:15
... resulting month does not have as many days. (For
example, April 30th is the answer to adding one month.) The following three examples in
Listing 6 .21 provide the same result.
L
ISTING
6 .21
Adding ... 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 ... left in the given month.
LAST_DAY(input_date_passed)
You will compute the last days in the month when summer officially starts from 1999.
Execute the code in Listing 6.27.
L
ISTING
6.27
Finding...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P6 docx
Ngày tải lên :
15/12/2013, 05:15
... 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 ... will insert a new record into the Employee
table.
This insert statement will use the next increment of the
emp_id_seq
sequence for the
value to be inserted into the
emp_id
column.
INSERT into ... IF;
29: END;
30: /
Line 12 places a value into the table associated with the index value 10. There
are no other values in the table. Line 17, inside the nested PL/SQL block (lines
16 21) , attempts...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P7 ppt
Ngày tải lên :
15/12/2013, 05:15
... imagina-
tion. Some common uses are
• Enforcing business rules
• Maintaining referential integrity
• Enforcing security
• Maintaining a historical log of changes
• Generating column values, including ... 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 ... read in.
13: depts dept_table;
14: depts_max PLS_INTEGER;
15: inx1 PLS_INTEGER;
16: BEGIN
17: Initialize the index into the table.
18: depts_max := 0;
19:
20: Initialize the table by creating...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P8 pptx
Ngày tải lên :
15/12/2013, 05:15
... (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 ... database.
L
ISTING
12.8
Inserting Some
building
Objects
1: INSERT INTO buildings
2: values (building(‘Victor Building’,
3: address(‘203 Washington Square’,’ ‘,’Lansing’,
4: ‘MI’,’48823’,’ ‘),
5:...
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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 ... SUBSTR(BLOB_Locator,
Read_Amount IN BINARY_INTEGER,
Starting_Location IN INTEGER := 1)
RETURN RAW;
FUNCTION SUBSTR(CLOB_Locator CHARACTER SET Set_Desired,
Read_Amount IN BINARY_INTEGER,
Starting_Location IN INTEGER := ... COMPARE(
Lob1 IN BLOB,
Lob2 IN BLOB,
Number_Bytes_to_Compare IN INTEGER,
Origin_Lob1 IN INTEGER := 1,
Origin_Lob2 IN INTEGER := 1)
RETURN Compare_Result_Integer;
FUNCTION COMPARE(
Lob1 IN CLOB CHARACTER...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P10 docx
Ngày tải lên :
15/12/2013, 05:15
... IMMEDIATE
statement.
EXECUTE IMMEDIATE string
[INTO {variable[, variable] | record}]
[USING [IN | OUT | IN OUT] bind
[, [IN | OUT | IN OUT] bind] ];
In this syntax the parameters are as follows:
•
string
is a variable ...
DBMS_SQL
package.
Listing 16.7 shows a PL/SQL block that dynamically generates an
INSERT
statement, and
then uses it to insert data into the table
yourtable
,created in Listing 16.6.
L
ISTING
16.7 Using Bind ... IN INTEGER,
name IN VARCHAR2,
value IN datatype);
PROCEDURE BIND_VARIABLE_CHAR(c IN INTEGER,
name IN VARCHAR2,
value IN CHAR,
out_value_size IN INTEGER);
In this syntax the parameters are as...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P11 docx
Ngày tải lên :
15/12/2013, 05:15
... 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 ... combined_names := ‘’;
40: FOR inx1 IN 1 lines_to_get LOOP
41: IF inx1 > 1 THEN
42: combined_names := combined_names || ‘ and ‘;
43: END IF;
44:
45: combined_names := combined_names || names(inx1);
46: ... 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...
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Tài liệu Teach Yourself PL/SQL in 21 Days- P12 doc
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15/12/2013, 05:15
... 1,000 days!
Note
Removing the Pipe
You can free resources by removing the pipes. Enter and execute the code in Listing 19.9.
L
ISTING
19.9
Removing Both Pipes
1: DECLARE
2: v_stat NUMBER ;
3: BEGIN
4: ... the polling time in seconds using
SET_DEFAULTS
.
The Syntax for the
SET_DEFAULTS
Procedure
PROCEDURE SET_DEFAULTS(polling_interval IN NUMBER);
You specify the interval between polling in seconds. ... support the GUI libraries in the sense that you can
write them into code, but any attempt at actually instantiating a GUI interface within the
server results in an exception being thrown.
Will PL/SQL...
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