oracle sql string functions

Department groupSelect Deptno, Max (ename), Max (SAL),Min (ename), Min (Sal),AVG (SAL),Count (*), COUNT (Job), COUNT (Distinct (job)),Sum (SAL) from the EMP group by DEPTNO;2) Department 30 maximum wage, minimum wage, total number, number of jobs, number of jobs and sum of wagesSelect Deptno, Max (ename), Max (SAL),Min (ename), Min (Sal),AVG (SAL),Count (*), COUNT (Job), COUNT (Distinct (job)),Sum (SAL) from the EMP group by DEPTNO have deptno=30;3.stddev returns the standard deviation of a set

Differences between oracle and SQL (common functions) ORACLE functions BitsCN.com Many software companies understand the importance of developing applications that do not depend on specific database types (such as Oracle,

Single-record functions in SQL 1.ASCII returns 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.CHR gives an integer and returns the corresponding character;

1. stored Procedures, functions, and triggers are all written in plsql. the process, function, and trigger are in the Oracle database. plsql is a very powerful database process Language 4. stored Procedures and functions can be used to call more Oracle Data in Java. video tutorial: 2.taobao.comitem.htm? Id42922011874sp

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

SQL string connection function (MSSQL MySQL tutorial Oracle)MySQL String connection concat functionHow to use:Concat (STR1,STR2,...) MySQL appends a string to a field in the table:UPDATE table_name set FIELD=CONCAT (field, ', str ') MySQL adds a

Differences between oracle and SQL (common functions) (3) ORACLE functions BitsCN.com Rn S: select patindex ('% d % q %', 'sdsfasdqe ') value O: oracle not found, however, instr can use the fourth parameter to control the number o

Comparison of common functions of SQL Server and Oracle, sqlserveroracle --------- Mathematical functions1. Absolute ValueS: select abs (-1) valueO: select abs (-1) value from dual2. INTEGER (large)S: select ceiling (-1.001) valueO: select ceil (-1.001) value from dual3. Round (small)S: select floor (-1.001) valueO: select floor (-1.001) value from dual4. Round (

andTruncate tableOperation BesidesDeleteCommand,OracleYou can also useTruncate tableCommand to delete table data. HoweverTruncate tableStatement andDeleteStatements are essentially different.DeleteStatement andInsert,UpdateStatementDML --The category of the data operation language. After the data is modified, you can roll back to ignore the data modification. WhileTruncate tableThe statement isDDL --Category of a Data Definition Language. data cannot be rolled back after it is deleted.

Comparison of common SQL Server and Oracle Functions Procedure Pro_SubPro(Dw_in in varchar2,Cur out pkg_general.ROW_CURSOR)AsBeginOpen curSelect yqmc from fle80 where dwbm = dw_in;End Pro_SubPro;Procedure Pro_MainPro (Dw_in in varchar2)AsMc NVARCHAR2 (20 );Cur pkg_general.ROW_CURSOR;BeginPro_SubPro (dw_in, cur );Fetch cur into mc;LoopExit when cur % notfound;Dbm

target object of the delete action is at the record level, you do not need to specify the column name information. We can use SQL> delete from students where student_id> 10; 3.2 delete Besides SQL> rollback; Lower function:This function can change all uppercase letters to lowercase letters.SELECT lower ('abcde') FROM dual;Dual table is a virtual table. Upper function: converts the input

TimeS: can go directly or select cast (' 2004-09-08 ' as datetime) valueO:select to_date (' 2004-01-05 22:09:38 ', ' yyyy-mm-dd hh24-mi-ss ') Vaule from DUAL;43. Find the difference between a part of two dates (e.g. seconds)S:select DateDiff (Ss,getdate (), GETDATE () +12.3) valueO: Subtract directly from two dates (e.g. d1-d2=12.3)SELECT (D1-D2) *24*60*60 vaule from DUAL;44. Date of novelty based on difference (e.g. minutes)S:select DateAdd (Mi,8,getdate ()) valueO:select sysdate+8/60/24 vaule

static void Main (string[] args) {try {1. Load DriverClass.forName ("Oracle.jdbc.driver.OracleDriver");2. Get ConnectedConnection ct = drivermanager.getconnection ("Jdbc:oracle:thin:@127.0.0.1:1521:orcl", "Scott", "Oracle");3. Create PreparedStatementPreparedStatement PS = ct.preparestatement ("Select Annual_incomec (' SCOTT ') annual from dual");4. ImplementationResultSet Rs=ps.executequery ();if (Rs.next

Label:function is used to return specific data, and when a function is established, the function header must contain a return clause. The body of the function must contain the data returned by the return statement. We can use CREATE function to create functions. 1), followed by a case to simulate the use of functions --Enter the employee's name and return the employee's annual salaryCREATE FUNCTION Annual

Oracle broadly divides functions into single-line functions, aggregate functions, and analytic functions.Single-line functions are divided into character functions, date functions, conv

Label:Some of the company's Oracle projects have recently been transferred to Ms_sql and have encountered translation problems in translating Oracle functions into Ms-sql procedure. Luo lists these questions: First, Oracle basic type

; -- Remember to close the opened cursor. Unless you return a cursor as the output parameter or function value of the stored procedureClose v_cur;O_n_ret: = 0;Exception when others thenRaise;End;/ Create or replace procedure P_VARCHAR2_LST_DYMANTIC (I _name varchar2, -- input parameter, the string contained in the name to be queriedO_t_varchar out t_varchar, -- output parameter, which is a defined variable-length varchar2 array.O_n_ret out number -- o

Tags: style blog http java color usefunction is used to return specific data, and when a function is established, the function header must contain a return clause. The body of the function must contain the data returned by the return statement. We can use CREATE function to create functions.1), followed by a case to simulate the use of functions--Enter the employee's name and return the employee's annual sa

Oracle mathematical functions are not the same as those in SQL Server. The following describes the differences between Oracle mathematical functions and SQL Server mathematical functions