valid date functions in oracle sql

... the date datatype is not a character format Columns with date datatypes contain both date and time We must formatdates to see all of the information contained in a date If you type: SELECT SYSDATE ... 2Reporting Tools in Oracle’s SQL*Plus The purpose of this chapter is to present some tions that will move us to common ground when usingthe reporting tools of Oracle’s SQL*Plus As we sug-gested in ... present Here is an example: SELECT TRIM (' This string has leading and trailing -This string has leading and trailing spaces Both the leading and trailing spaces are deleted This isprobably the most

Ngày tải lên: 08/08/2014, 18:21

... (i.e., a “window”) and reporting the result in one “window row.” An example of this tech- nique would be in applications where one wants to smooth data by finding a moving average Moving averages ... Region)Portion2 Christina 55000 302197802 302197802 ****** Trang 13Windowing Subclauses with Physical Offsets in Aggregate AnalyticalFunctions A windowing subclause is a way of capturing several rows ... for ordering in the function Also, only numeric or date data types would make sense in calculations of aggre- gates Here is the above example in SQL using physical offsets for the moving average

Ngày tải lên: 08/08/2014, 18:21

... Trang 8ordering mirror the result set ordering, but as we trated here, it is not mandatory.illus-ROLLUP In ordinary SQL, we can produce a summary of thegrouped aggregate by using set functions ... Predicate in Oracle’s SQL The MODEL statement allows us to do calculations on a column in a row based on other rows in a result set.The MODEL or SPREADSHEET clause is very muchlike treating the ... Trang 1We begin by looking a little closer at the use ofGROUP BY.GROUP BY First we look at some preliminaries with respect to theGROUP BY clause When an aggregate is used in aSQL statement,

Ngày tải lên: 08/08/2014, 18:21

... one in the MEASURES clause We are not bound to report in theresult set the values we use in the MEASURES clause On the other hand, to use the values in the RULES wehave to have defined them in ... We put values in the table where: SELECT * FROM square_root Trang 24Here, we are going to try to find the square root oforiginal whose value is 21 We predefined the column formatting here to be ... the SQL engine determine whichneeds to be computed first The phrase AUTOMATICORDER may be put in the RULES like this: “pro-SELECT product, t, x orig, projected FROM sales2 MODEL RETURN UPDATED

Ngày tải lên: 08/08/2014, 18:21

... ourselves by asking the pat-tern to begin looking in the second position of thestring The contradiction results in a non-matchbecause the search string cannot be anchored at thebeginning and then ... negating marker We may negatethe string we are looking for by placing a negatingcaret at the beginning of the string like this: SELECT addr FROM addresses WHERE REGEXP_LIKE(addr,'[^gp]') Giving: ... would be insisting onmatching at least one “b”; with only a single “a” in atarget string we get no result:SELECT REGEXP_SUBSTR('a','ab+') FROM dual Giving: R - But, if we have succeeding “b”s,

Ngày tải lên: 08/08/2014, 18:21

... Formatting in SELECTSince the above output looks sloppy, some column matting is in order: for-SQL> COLUMN name FORMAT a9 SQL> COLUMN empno FORMAT 999999 SQL> COLUMN address FORMAT a50 SQL> ... table Wecan use a reference to Address_table in the insert with-out going through the INSERT-null-UPDATE sequence we introduced in the last section: INSERT INTO client SELECT 'Walsh', REF(aa) -ADDRESS_OBJ('11 ... referencing address_obj, which iscontained in an object table, Address_table INSERT Values into a Table that Contains Row Objects (TCRO) How do we get values into this table that contains rowobjects?

Ngày tải lên: 08/08/2014, 18:21

... of exchanging data over theInternet In HTML, tags are standard For example, <b> is an opening tag for bolding, </u> is a closingtag for underlining, <h2> is an opening tag for ... FROM emp e, TABLE(e.dep_in_emp) f WHERE f.dname = 'Daphne' Trang 17INSERT INTO nested tables may be handled similarlyusing the virtual TABLE:INSERT INTO TABLE(SELECT e.dep_in_emp e FROM emp e WHERE ... DEPENDENT_OBJECT - - Now insert the following into EMP: INSERT INTO emp VALUES(100, 'Smith', 'Programmer', dependent_object_table(dependent_object('David', 'M',to_date('10/10/1997','dd/mm/yyyy')),

Ngày tải lên: 08/08/2014, 18:21

... give: LTRIM -Mitho REGEXP_INSTR This function returns the location (beginning) of a tern in a given string REGEXP_INSTR extends the regular INSTR string function by allowing searches of regular ... REPLACE('MI -MississipPI 364 String Functions Trang 6This function makes a string a certain length by adding (padding) a specified set of characters to the right of the original string RPAD stands for “right ... query: SELECT UPPER('makes the string into big letters') FROM dual 368 String Functions Trang 10Will give:UPPER('MAKESTHESTRINGINTOBIGLETTE -MAKES THE STRING INTO BIG LETTERS VSIZE This function

Ngày tải lên: 08/08/2014, 18:21

... 9Built-in functions 2 Functions in MS SQL Server Trang 102 Functions in MS SQL ServerWhat are Built-In Functions? Built-in function là 1 mảnh nhỏ của lập trình có thể có hoặc không có input và ... chuỗi có kiểu dữ liệu là nvarchar. Trang 132 Functions in MS SQL ServerUsing date and time functions Trang 142 Functions in MS SQL ServerString functions RTRIM và LTRIM function xóa khoảng ... trong SQL Built-In function thường được sử dụng trong câu lệnh SELECT để tính toán những giá trị hoặc điều khiển dữ liệu Trang 112 Functions in MS SQL ServerUsing date and time functions The GETDATE

Ngày tải lên: 04/04/2023, 08:24

... Functions(tt)Trang 37Date FunctionsSYSDATE() is the most commonly used Oracle date function provided by SQL*Plus. The Oracle date function SYSDATE() returns the current date and time in the default Oracle date ... executed independently where as procedure represents an independent executable statement. Trang 33Built-in Functions in PL/SQLTrang 34Conversion FunctionsTrang 35String FunctionsTrang 36String Functions(tt)Trang ... 5PL/SQL subprogramsPL/SQL subprograms are named PL/SQL blocks that can be invoked with a set of parameters PL/SQL provides two kinds of subprograms:  Functions – These subprograms return a single

Ngày tải lên: 04/04/2023, 08:30

... Trang 1Controlling Flow in PL/SQLBlocks 23 Trang 2Schedule: Timing Topic40 minutes Lecture 60 minutes Practice 100 minutes Total Class Management Note: Files required ... bound D Reference the index within the loop only; it is undefined outside the loop D Reference the existing value of an index within an expression D Do not reference the index as the target of ... Once the rows are updated, find out how many rows were updated Print thefollowing statements to the screen based on the number of rows updated.i. If less than three rows updated, statement should

Ngày tải lên: 21/12/2013, 06:17

... Features of Oracle SQL In this chapter:
What are the new features of Oracle SQL in Oracle Database 10g?
What were the new features of Oracle SQL in Oracle Database 9i?
What PL/SQL improvements ... multiple-line SQL statements to be placed into a single line of SQL or PL/SQL code The term used by Oracle mentation is “describing user’s interest in data” (see Chapter 14) docu-
The Oracle Expression ... possible in Oracle SQL with respect to SQL coding cannow be coded and executed from within PL/SQL PL/SQL is nowfully syntactically equivalent with Oracle SQL In other words, allOracle SQL commands

Ngày tải lên: 24/12/2013, 12:17

... ture of Oracle Database plus new features available in both Oracle Database struc-10g and Oracle Database 9i Now it’s time to begin looking into Oracle SQL itself The next chapter begins this ... ('%c%');
Oracle Database 10g ignores line breaks and spacing in SQL mands For example, the following two SELECT statements are iden-tical when submitted in SQL*Plus, even though spacing and line Trang ... Subtracting two dates (the SYSDATE and the DUE_DATE) When you subtract dates, Oracle Database 10g will calculate the number of days between the two dates Dates are stored internally as Julian datesand

Ngày tải lên: 24/12/2013, 12:17

... Pseudocolumns in Oracle Database (continued) Trang 17This page intentionally left blank Trang 18Using SQL*Plus In this chapter:
What are environmental settings for SQL*Plus formatting?
How are ... headings Set to ON (thedefault) to display column headings
LINE[SIZE] The number of characters on one line before SQL*Plusstarts a new line The default in SQL*Plus is 80, and the default inSQL*Plus ... used in SQL*Plus?
How are scripts used in SQL*Plus?
How are reports formatted in SQL*Plus?
How is iSQL*Plus used for reporting? This chapter shows you how to use the environmental settings,

Ngày tải lên: 24/12/2013, 12:17

... seen afew functions in previous chapters (e.g., NVL and SYSDATE) Before weexamine single-row functions in detail, let’s look at Oracle-provided built- in functions in general Grouping functions ... the remaining func-tions tend to be obscure and seldom used In fact, some functions included in this chapter are obscure Let’s begin with string functions 9.2.1 String Functions The string functions ... Single-Row Functions9.1 Types of Functions Oracle divides all functions into the following categories:
Single-Row Functions Functions that operate on a single row at atime This chapter examines

Ngày tải lên: 24/12/2013, 12:17

... containingextra filtering using Boolean logic AND, OR, IN, and EXISTS clause filter- Trang 1210.3 Examining Different Types of Joins 231Chapter 10 ing Mutable joins are extremely common in modern-day ... col-umns in a join An equi-join is the fastest join type because it can find an exact match (a single row) An equi-join is best used on uniqueindexes such as primary keys
Anti-Join This type of join ... wasted finding a row not matching a condition
Range Join In this case, a range scan is required using the <, >, or BETWEEN operators
The [NOT] IN clause The IN clause allows value checking

Ngày tải lên: 24/12/2013, 12:17

... to validate a set of columns against another set of columns in a WHERE clause or as a tuned FROM clause row filter (inline view), asshown in the two examples following The first example following ... subqueries not covered in this chapter so far areDML command subqueries, as in the INSERT and UPDATE statements.Placing subqueries in the VALUES clause of an INSERT statement and inUPDATE statements ... Removing the WHEREclause filter from the query in Figure 12.2 results in an error, as shown inFigure 12.3 The subquery in Figure 12.3 returns all rows in the INSTRU-MENT table Figure 12.2 A Single-Row

Ngày tải lên: 24/12/2013, 12:17

... originate from the SALES table, using asingle multiple-table INSERT command, inserting into the three tablesbased on the retailer data in each row The initial query is shown in Figure15.10, showing ... with single-row functions in Chapter 9 or with grouping functions Addition-in Chapter 11 Like Chapter 7, this chapter contains some information found in otherchapters, but it also contains new information ... string containing ROWID values for an index-organized table, object table, or non-Ora- cle entity Can be up to 4,000 bytes. 32-bit binary precision floating-point number including ues for infinity

Ngày tải lên: 24/12/2013, 12:17

... an Oracledatabase In this section we examine XML and Oracle Database in three ways: (1)creating new XML documents in the database; (2) retrieving XML docu-ments stored in the database, both in ... shown in Figure 18.8 com-In the second SQL*Plus Worksheet instance, we execute the secondscript as shown following See the result in Figure 18.9 INSERT INTO TEMP(col1) VALUES(1); INSERT INTO ... is the recycle bin? This chapter shows you how to do all sorts of stuff with tables Creatingand changing of tables includes defining and creating structure withintables and making changes to those

Ngày tải lên: 24/12/2013, 12:17

... penultimate section in this chapter on tables will examine the recy- cle bin, which is newly introduced in Oracle Database 10g. 18.7 The Recycle Bin Oracle Database 10g introduces a recycle bin This feature ... artist who will be using your studio to record her latest song The following command will insert a row into theARTIST table using the CONSTRAINT_USARTISTS view: INSERT INTO CONSTRAINT_USARTISTS VALUES ... built by updating the view You can also insertand delete rows in the base table through the view
Constraint View A constraint view can be used to insert a new rowinto the underlying table as

Ngày tải lên: 21/01/2014, 18:20