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Teach yourself SQL in 21 days
... 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...
Ngày tải lên: 06/08/2013, 17:39
Teach Yourself PL/SQL in 21 Days- P16
... 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,...
Ngày tải lên: 20/10/2013, 17:15
Contents i What’s New with This Edition Teach Yourself ANSI C++ in 21 Days, Premier Edition, is
... 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....
Ngày tải lên: 20/10/2013, 17:15
Teach Yourself PL/SQL in 21 Days- P1
... 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...
Ngày tải lên: 07/11/2013, 20:15
Teach Yourself PL/SQL in 21 Days- P2
... 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...
Ngày tải lên: 07/11/2013, 20:15
Teach Yourself PL/SQL in 21 Days- P3
... 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....
Ngày tải lên: 07/11/2013, 20:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P4 pptx
... (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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P5 doc
... 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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P6 docx
... 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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P7 ppt
... 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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P8 pptx
... (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:...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P9 doc
... 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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P10 docx
... 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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P11 docx
... 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...
Ngày tải lên: 15/12/2013, 05:15
Tài liệu Teach Yourself PL/SQL in 21 Days- P12 doc
... 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...
Ngày tải lên: 15/12/2013, 05:15
