oracle sql string functions

Oracle computing time functions (numtodsinterval, numtoyminterval), oracle computing functions Numtodsinterval (, X is a number, and c is a string, Indicates the unit of x. This function converts x to interval day to second. Commonly Used units include ('day', 'hour', 'minu

Oracle _ Common grouping functions and oracle grouping FunctionsZookeeper Oracle _ Common grouping Functions① Grouping Function1. max (column): calculates the maximum value, which is not required for the data type. Any data type can be used.2. min (column): calculates the mi

Single-record functions in SQL1. ASCIIReturns the decimal number corresponding to the specified character;SQL> select ASCII ('A') A, ASCII ('A') A, ASCII ('0') zero, ASCII ('') space from dual; A A zero space------------------------------------65 97 48 32 2. CHRReturns the corresponding characters;SQL> select CHR (54740) Zhao, CHR (65) chr65 from dual; Zh C---Zha

Oracle analysis functions (notes), oracle Functions Analytics functions are new types of functions introduced by oracle Database in 9i and are continuously enhanced in later versions. T

Single-record functions in SQL1. ASCIIReturns the decimal number corresponding to the specified character;SQL> select ASCII ('A') A, ASCII ('A') A, ASCII ('0') zero, ASCII ('') space from dual;A A zero space------------------------------------65 97 48 32 2. CHRReturns the corresponding characters;SQL> select CHR (54740) Zhao, CHR (65) chr65 from dual; Zh C---

, returns twice times the wage (2*sal), if it is 30, returns 3 times times the wage, if not, then returns half the wageSelect Ename,deptno,sal,Case DeptnoWhen Ten then 1*salWhen 2*salWhen 3*salelse SAL/2Endfrom EMP;②decode:decode (EXPR1,EXPR2,EXPR3,.........)Eg: Judge Deptno, if it is department 10th, returns one-fold pay (1*sal), or 0 if not.Sql>select Ename,deptno,sal,decode (deptno,10,sal,0) from EMP;Eg: to judge Deptno, if it is Department 10th, return one-fold salary (1*sal), return 30 time

In Oracle, how does one determine whether a string is a number or an oracle string?Method 1: Use the To_Number function to identify exceptions Create or replace function Is_Number (Str _ VARCHAR2) RETURN VARCHAR2ISNum _ NUMBER;BEGINNum _: = to_number (str _);RETURN 'y ';EXCEPTIONWHEN OTHERS THENRETURN 'n ';END Is_Numbe

into Oracle servers and Oracle tools that can treat PL/SQL as an engine within an Oracle server, and a single SQL statement processor to handle pl/ SQL program block. The SQL statement

Oracle (11) string function, oracle string I. String Functions LENGTH (char1, char2) Select length ('abc def gh') FROM dual; -- get the LENGTH of the string, containing spaces. Result:

The following code has been tested to run directly Oracle analysis functions, multidimensional functions and model functions are briefly described, mainly for the BI report statistics, not necessarily very comprehensive, but a little explanation of the BI scenario --Create a Sales Quantity table, the data trend is in

Oracle Functions--common functions NVL (EXPRESS1,EXPRESS2): If the first expression is empty, the value of the second expression is displayed; If the first expression is not empty, the value of the first expression is displayed; NVL2 (EXPRESS1,EXPRESS2,EXPRESS3); Returns an expression of 3 if the first expression is empty, and returns an expression of 2 if the f

Php functions (encryption and decryption, random string, truncated string length, forced download, etc) Function encryptdecrypt ($ key, $ string, $ decrypt ){ If ($ decrypt ){ $ Decrypted = rtrim (mcrypt_decrypt (mcrypt_rijndael_256, md5 ($ key), base64_decode ($

Label:Original: SQL Server function Full solution One: Data type conversion functionWhen you work with values of different data types at the same time, SQL Server typically automatically makes a hermit type conversion. Values that are similar to data types are valid, such as int and float, but for other data types, such as Integer and character types, the Hermit transform cannot be implemented, and the disp

; sqlplus \ nolog SQL * Plus: Release 9.2.0.1.0-production on Tuesday June 28 11:05:27 2005 Copyright (c) 1982,200 2, Oracle Corporation. All rights reserved. SQL>ConnUser/password @ orclAs sysdba // user and password are your facial usernames and passwords, such as sys/123456 Error:ORA-12500: TNS: Listeners cannot start dedicated server processes

logged on -- Options: ENtryid, sessionid, terminal,Language, label, osdba --(All options not available inAll Oracle versions) Vsize (expr)-- Returns the number of BYtes used by the expression -- Useful in SElecting information about tAble Space Requirements *************************************************************** **************** * SQL date function