Database Administrator

Create table test as select * from dba_objects where rownum BeginFor I in 1 .. 7 loopInsert into test select * from test;Commit;End loop;End;BYS @ bys001> select count (*) from test;COUNT (*)----------1280000Elapsed: 00:00:01. 12BYS @ bys001> select

Some function records of Oracle to_char. 1. Convert to year, month, day, hour, minute, and second; 2. Turning it into a subtle operation SQL> select to_char (systimestamp, 'yyyy-mm-dd-hh24: mi: ss. ff') from dual; TO_CHAR (SYSTIMESTAMP, 'yyyy-MM-----

Platform: RHEL4.5, Oracle10.2.0.1Plan: db_name = ORCLDB, db_unique_name/ORACLE_SID = WENDINGThe above two parameters can also be set to the same, here is the main difference.1. Set Environment Variables$ Export ORACLE_BASE =/u01/app/oracle$ Export

Table types can be used in Stored Procedures for batch addition. Table type definition: Create type dbo. subCardTable as table ([SC _ID] [varchar] (50), [ZhuKaInfo_ID] [varchar] (50), [Project_KeyName] [varchar] (50 ), [SC _CardNumber] [varchar]

Code: Private Sub some_Click () 'defines the Dim txtSQL As String Dim MsgText As String Dim Online_mrc As ADODB. recordset Dim mrc1 As ADODB. recordset Dim txtStr As String Dim MsgTxt As String Dim mm As String 'when no row is selected, the user is

What is the meaning of adding N before the T-SQL string, such as select @ status = N 'stopped ', then why should N be added before the string stopped? In addition, we find that N is not affected in some places, and N must be added in some places.

 2: How to view SQL Execution plans without using third-party toolsSet autotrace on If the following error occurs:SP2-0613: unable to verify PLAN_TABLE format or entitySP2-0611: An error occurred while enabling EXPLAIN reportRun oraclehome \ ora92 \

  The IndyTCPDB component is developed based on Indy10.6 and can quickly integrate the existing C/S software (ADO/BDE/dbExpress) is supported by IndyTCPDB, which can be applied to the Internet and secure information systems. IndyTCPDB uses the

When you exit SQLPLUS, there is no response-you cannot exit normally if you are stuck.When you log on to the host where the database is located and use SQLPLUS to log on to the DBA, an error occurred while archiving. [Oracle @ oel-01 ~] $ Sqlplus

  Session1:SQL> conn scott/trigerConnected.SQL> CREATE TABLE tx_eg (num number, txt varchar2 (10), sex varchar2 (10) INITRANS 1 MAXTRANS 1;INSERT into tx_eg VALUES (1, 'First ', 'female ');INSERT into tx_eg VALUES (2, 'second', 'male ');INSERT into

/* Implemented functions: Use a database to store text data and read it and put it in the current project for analysis: the difficulty is not great. The key is to master the file stream, and there are not many database operations, but the file

1. Non-connection mode (dependent on datasets)2. Connection Mode (directly operate on the database) You can use a command object to execute SQL statements or stored procedures. If the execution result returns a record set, you can use the

Common methods to solve IO problems: Through SQL optimization, you can reduce the IO requests of the database: Adjust the instance parameters to reduce the database's IO requests: Compared to 1000 data transmission requests

www.codeke.com List name enter a word enter the old word select Operation Type Add Delete change query Title: Add news query news www.codeke.com setDanci ($

We can see that the cpu usage of oracle processes such as 6331,6517 is too high, 2) view related process information: [oracle@oracle-one ~]$ ps -ef | grep 6331oracle 6331 1 23 20:24 ? 00:02:05 ora_vktm_RHYSoracle 6555 6385 0 20:32

./configure --prefix=/home/mysql51/mysql/ --enable-assembler --enable-local-infile --enable-thread-safe-client --with-big-tables --with-charset=utf8 --with-extra-charsets=gbk,gb2312,utf8,ascii --with-readline --with-ssl --with-embedded-server --

The scope of this article is only true paging. The paging mentioned below also refers to real paging.). Paging commonalities Comparison of Three data paging Methods Special Page of MySql database Common Paging for Oracle databases Select T.

SQL> Select sysdate from dual;SYSDATE----------21-6SQL> Select last_day (sysdate) from dual;LAST_DAY (S----------30-6Date_value: = add_months (date_value, number_of_months)SQL> Select add_months (sysdate, 2) from dual;ADD_MONTHS----------21-8SQL>

This operation is performed at the WIN command prompt, and phpMyAdmin is also applicable.User: phplamp user database: phplampDB// Log on to MYSQL@> Mysql-u root-p@> Password// Create a userMysql> insert into mysql. user (Host, User, Password) values

Modified: Jun 8, 2013 Type: ALERT Status: PUBLISHED Priority: 3 Applies:Oracle Database-Enterprise EditionLinux x86Linux x86-64 DESCRIPTIONStarting with RedHat 6, OEL 6, SLES 11 and UEK2 kernels, Transparent HugePages are implemented and enabled