Oracle

Run cmd www.2cto.com 1cd D as an administrator to configure AUTOTRACE for sqlplus: \ app \ Users \ product \ 11.2.0 \ dbhome_1 \ RDBMS \ ADMIN2sqlplus/nolog3connect system4manager5 6 @ utlxplan7create public synonym plan_table for plan_table -- run

PLUSTRACE included in SELECT_CATALOG_ROLE Autotrace is already included in SELECT_CATALOG_ROLE, that is, you do not need to grant plustrace to user. SELECT * FROM DBA_TAB_PRIVS where grantee = 'select _ catalog_role' AND TABLE_NAME IN ('v _ $

Oracle sys_refcursor statement Ref_cursor code export create or replace procedure testprodurce is cursor c_row is select * from fpkj; ref_c_row sys_refcursor; -- ref_c_row kplsh varchar2 (200); kplx number; begin for tmp in c_row loop

Oracle beginners to master Part 1-user management learning database, first have to log on to the database, login needs an account? Then we should first understand Oracle's account management and rules, which can better deal with database security

The Oracle nvl () and nvl2 () functions introduce a function in the NVL function Oracle/PLSQL. Format: www.2cto.com NVL (string1, replace_with) function: If string1 is NULL, The NVL function returns the value of replace_with; otherwise, the value of

An oracle 10g is installed in linux when I log on to sqlplus. After I log on to sqlplus, I see www.2cto.com SQL> startup ORACLE ??????? Total System Global Area 167772160 bytes Fixed Size 1218316 bytes Variable Size 67111156 bytes Database Buffers 96

In pl \ SQL, the process control method block www.2cto.com Java code declare username varchar2 (20); begin select t. ename into username from emp t where rownum = 1; dbms_output.put_line (username); end; 2 use case when in oracle for Java code

The tablespace adjustment record of an oracle RAC database was originally thought to be a matter of several commands, but it turned out to be overwhelmed. The reason is that some commands are not processed properly.Clearly, I only know how to use it,

Oracle AUTOTRACE statistical information explanation of statistical information in AUTOTRACE: www.2cto.com recursive cals: RECURSIVE read to ensure the smooth execution of user-sent SQL statements, ORACLE must execute some additional statements.

Oracle order by: In the decode SQL statement, www.2cto.com order by can be sorted in the specified order. No, for example, NCH HCH ACS TWN .... order by decode (col, 'nch ', '1', 'hch', '2', 'acs', '3', 'twn', '4', col) col indicates the data found

Add a sequence number for the read data in oracle. When we demonstrate the Report to the customer, the customer sometimes puts it in the first column of the report, can I add a serial No. www.2cto.com? But if I modify the program code, it can be

Oracle batch operation the following code is used for exercises when learning oracle. batch operation can solve the efficiency problem well: www.2cto.com Java code --- create table test2 (id number (6 ), name varchar2 (10) delete test2; select *

How to solve the problem of alter tablespace MAXTHONBI add datafile '/data/oracledata/biapp/maxthonbi2.dbf 'size 10 M autoextend on next 10 M maxsize 10G www.2cto.com after the linux Oracle tablespace is full can be added using the above method

The method for generating and displaying execution plans in Oracle generates an execution plan. After a legal statement is executed, at least one execution plan is generated in the memory, which can be queried from the view v $ SQL _plan. Each

Oracle online redo log recovery (redo log) Non-current online log File fault recovery www.2cto.com 1. ORA-00313 error when starting the database. ORA-00313: open failed for members of log group 1 of thread 1ORA-00312: online log 1 thread 1:

Insert a string containing "&" into the oracle database: www.2cto.com 1. If "&" does not have a string, "&" is a simple character and is processed by character; 2. If & is followed by a string, follow oracle's statement to Operate & as a variable.

Oracle relational uard Switchover on primary databaseSQL> select database_role from v $ database; DATABASE_ROLE www.2cto.com -------------- primary SQL> alter database commit to switchover to physical standby; Database altered. SQL> select open_mode,

Oracle SQL _trace tracking and analysis using tkprof toolsWhen a certain SQL statement is executed or a process/package is executed, the performance may be faulty. We can use SQL _trace to track the execution status of the SQL statement and output

Oracle deletes duplicate data with only one SQL statement www.2cto.com for querying and deleting duplicate records 1. Searches for redundant duplicate records in the Table. duplicate records are based on a single field (Id) select * from table where

What Does oracle do when executing commit? COMMIT is a very fast operation. When we release the commit command, the really difficult action has been completed and the data changes have been executed in the database, therefore, 99% of the tasks have