Oracle

Oracle 11G 11.2.0.1.0 using exp cannot export empty tables solution 11G (11.2.0.1.0) has a bug, when the table does not have data, no segment is assigned solution: www.2cto.com 1, insert a row, then rollback generates the segment. This method

Table space commands and query SQL 1. Delete table space and data files drop tablespace TS_GLOBAL_01 including contents and datafiles; 2. Delete the data file www.2cto.com alter database datafile '/oradata/DTCDB/TS_INDEX_02' offline drop; 3.

PL/SQL creates tablespaces, creates users, and authorizes users.DeclareusrName varchar2 (20): = 'username'; pwd varchar2 (20): = 'Password'; tsName varchar2 (20): = 'xmszcgl _ aid '; dfPath varchar2 (300): = 'd: \ dataSource \ xmszcgl_aid.data ';

The following table lists the questions about updating field values with cursors in Oracle: [csharp] SQL> set pagesize 60; SQL> run; 1 * select * from employee www.2cto.com name salary ---------- SMITH 800 ALLEN 1600 WARD 1250 JONES 2975 MARTIN 1250

The oracle bbed (Oracle Block Browser and Editor) tool is an internal data Block-level viewing and modification tool provided by Oracle. With this tool, we can easily view the storage details at the block level of Oracle to better understand the

Transaction isolation level: the degree of isolation between one transaction's modification to the database and another transaction in parallel. When two concurrent transactions access the same row in the database table at the same time, there may

Oracle (2) permission management system permissions and object permissions (authorization and revocation) // system permissions www.2cto.com grant create session to lisi; grant create table to lisi; grant unlimited tablespace to lisi; revoke create

Oracle control structure (where the goto statement is known) a) Condition Statement if --- then/if -- then -- else/if -- then -- eslif -- then Example 1 ): write a process and enter the employee name. If the employee's salary is lower than 2000,

Sort out and summarize common Oracle commands-this error occurs when you and I perform batch Hibernate inserts. org. hibernate. QueryTimeoutException:The cause of the error is that the tablespace capacity is insufficient and you need to increase the

Oracle batch drop and batch flashback raise the question: if you do not write a stored procedure, drop can only generate one table at a time. In this case, how can I delete multiple tables at a time? Solution: Use select statements to query all the

Oracle cursor (iii) REF Dynamic Cursor link: Oracle cursor (I) Explicit cursor http://www.bkjia.com/database/201208/150342.html#oraclecursor (ii) Implicit cursor http://www.bkjia.com/database/201208/150344.html REF dynamic cursor is used to process

The global Deadlock Detection Time of RAC is within seconds for a single-instance database. In the RAC environment, the Deadlock Detection Time reaches 1 minute by default. If a deadlock occurs in a single instance environment, one of the processes

For example, if the latest sequential number is DJJT12090600003 and the next sequential number is: DJJT12090600003 generated on the current day, if the sequential number is DJJT12090600004, if it is generated on the next day: DJJT12090700001

The default sorting of database select oracle does not sort the results returned by statements without order by. oracle reads data in the physical storage order. Because rowid is the address of each row of data, it sometimes looks like it is sorted

Flashback six major technologies: flashback database environment: [SQL] sys @ ORCL> select * from v $ version where rownum = 1; BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.

Oracle notes (10) Constraints related links: Oracle notes (1) Oracle introduction and installation http://www.bkjia.com/database/201209/154049.html#oraclenotes (2) SQLPlus command explain (3) Scott user's table structure explain (4) simple query,

Sqlplus login. SQL setting [SQL] define_editor = vi set serveroutput on size 100000 set trimspool on set long 5000 www.2cto.com set linesize 120 set pagesize 9999 column plan_plus_exp format a80 column global_name new_value gname set termout off

How to disable and enable automatic statistics collection for oracle 10g 1. Oracle 10g automatic statistics collection-Automatic analyze starts from oracle Database 10g, after creating a database, Oracle creates a scheduled task named

It is important to select an appropriate data type in Oracle's data type overview, because it is difficult to modify it in the future. Oracle provides 22 different SQL data types. For a brief introduction: www.2cto.com 1. char: fixed-length string,

Oracle trunc truncation date function truncation Date: www.2cto.com first run the command: alter session set nls_date_format = 'yyyy-mm-dd hh24: mi: hh'; capture today: SQL> select sysdate, trunc (sysdate, 'dd') from dual; sysdate trunc (SYSDATE,