Oracle

1, check whether to start the flash back deleteSQL> show Parameter recyclebin; NAME TYPE VALUE--------------------------------------------------------------------- --------recyclebin

C # and Oracle database connection poolingIn the middle of a project, use WebService and Oracle database. I did the user authentication on the server, that is, using the session to pass the user's login information. In the test, when the user is

First, the primary key self-growth:1) Oracle:Using a sequence implementation, such as creating a sequence, the starting point is 1000 and the step is 1: Create sequence myseq increment by 1 start withAdd Record: Insert into student

CREATE TABLE STUDENT (ID Number (Ten) is not NULL,NAME VARCHAR2 (10),SEX CHAR (1),Age Number (3),CreationDate DATE,MODIFIEDDATE DATE,PRIMARY KEY (ID));--Querying dataSELECT * from student;--Inserting dataINSERT into student

Create tablespace a_dat datafile ' D:\oracle\product\10.2.0\oradata\orcl\a_dat.dbf ' size 1024m autoextend on next 100m max Size Unlimited;Create temporary tablespace aa_dat_tempTempfile ' D:\oracle\product\10.2.0\oradata\orcl\a_dat_temp.dbf 'Size 10

ares-sdk Initial development test using Oracle database, due to the special needs of Ningbo Tsusho, the database environment must be shifted from Oracle to MySQL. the problems and experiences in the conversion process are summarized as

First, create a table:CREATE TABLE Example (ID Number (4) Not NULL PRIMARY KEY,NAME VARCHAR (25));Then, customize a sequence (sequence):CREATE SEQUENCE example_sequenceINCREMENT by 1--add a few each timeStart with 1-counting starting from

Original address: https://xuanwo.org/2016/01/03/vs-oracle-11g development environmentHost: Win10 + VS2015 + odp.net for VS2015Virtual machine: Win7 + Oracle 11g + bridgingConfigure Odp.netFirst download Oracle Developer Tools for Visual Studio 2015,

This article describes Oracle Analytic function usage, first building the library:SQL code CREATE TABLE earnings --working Money table ( Earnmonth VARCHAR2 (6), --Working month Area VARCHAR2 (a), --working areas Sno Varchar2 (Ten),

ADF Simple Project Creation ExampleThe simplest ADF project:650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/7C/B3/wKioL1bWjlSRS9tQAADOVRz1yhY445.png "title=" 26.png "alt=" Wkiol1bwjlsrs9tqaadovrz1yhy445.png "/>New ADF Project Process650)

SELECT DISTINCTFA. Application_short_name, FA. BasePath, Fat. Application_name, fe. Executable_name, fe. Execution_file_name, FCP. Concurrent_program_name, FCP. Output_file_type, FCP. Output_print_style, Fcpt.user_concurrent_program_name,

Windows 64-bit installed Oracle 11g 64-bit, Plsql developer uses the following issues:1. The Database drop-down box is empty:2, mandatory input user name, password and database, login popup:Initialzation errorcould not Initialize "...." Make sure

Oracle and Oracle Data Migration under the Goldengate architecture650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/7B/61/wKiom1bMe8XCQiRqAAEze5VKnU0626.png "title=" Qq20160223233227.png "alt=" Wkiom1bme8xcqirqaaeze5vknu0626.png "/>Host

Oracle Online tuning redo number of log groups and group membershipsFirst, adjust the redo log group sizeOperation Reason:Redo log general settings allow the log conversion time to 10-20 minutes, and the conversion too often affects performance.

-1. View the name and size of the Tablespace select T.tablespace_name, round (SUM (Bytes/(1024x768)), 0) Ts_sizefrom dba_tablespaces T, dba_data_file s Dwhere t.tablespace_name = D.tablespace_namegroup by t.tablespace_name;--2, view table space

when using left jion, the difference between on and where conditions is as follows:1. On condition is the condition used when generating a temporary table, which returns records from the left table regardless of whether the condition on is true.2.

One: The simple test job creation process case:1, first create a job_test table, the field is a date formatSql> CREATE TABLE Job_test (a date);Table createdSql> commit;Commit Complete2, create a stored procedure BB action is to insert data into the

Oracle's simplest, self-booting with the systemAs the saying goes, the user is God, they sometimes ask a question is very simple, just need a word, a minute will be finished. But it may take at least half an hour or even half a month for our DBA to

Oracle get the end of the year, the end of the month, the end of the quarter, the end of the oracle month 1 -- early year, end 2 select trunc (sysdate, 'yyyy') from dual; 3 select add_months (trunc (sysdate, 'yyyy'), 12)-1 from dual; 4 5 -- early

Sqoop exports hive data to oracle and sqoophive Use sqoop to import data from hive to oracle 1. Create a table in oracle Based on the hive table structure 2. Run the following command: Sqoop export -- table TABLE_NAME -- connect jdbc: oracle: