Oracle

Oracle dbms_output two minor issues of dbms_output in oracle 1. If the content of dbms_output.put_line cannot be displayed, You need to first input set serveroutput on in the command line; just repeat it, after dbms_output.put_line content can be

Print_table [SQL] www.2cto.com create or replace procedure print_table (p_query in varchar2, p_date_fmt in varchar2 default 'dd-mon-yyyy hh24: mi: ss ') -- this utility is designed to be installed ONCE in a database and used -- by all. also, it is

Oracle sqlldr data import error Field in data file exceeds maximum length solves the problem of Field in data file exceeds maximum length error when using oracle sqlldr for data import: www.2cto.com indicates that the data field is indeed longer

To add partitions to an oracle range Partition Table, perform the experiment in two cases. 1. There is no maxvalue partition. 2. maxvalue partitions are available. The following example shows how to add partitions in the range partition table

For example, there are two users in oracle, sysdb and hellodb, and table hello under sysdb. There is a baby table in hellodb. Now I want to use the hellodb User table baby in oracle user sysdb. select * from baby @ link_hellodb www.2cto.com =========

Summary of oracle thin client and plsql installation problem installation environment: After the oracle thin client is installed on win7 www.2cto.com, problems encountered during plsql login: Access violation at adress 614A2909 in module 'oran9. dll

How many Oracle Database startup methods do you know? There are four answers. there are four Oracle Database startup methods. Please refer to the first one: startup nomount non-installation startup: This method can be executed under startup:

Oracle Data complex type (2) 4. the nested oracle table www.2cto.com is similar to the previous index table. There are some minor differences (the subscript of the nested table starts from 1). Java code declare type sal_table is table of emp. sal %

1. Oracle Natural join www.2cto.com Java code create table test_table_A (id number primary key, nameVarchar (32); create table test_table_ B (id number primary key, name varchar (32), des varchar (32); select * from test_table_A; select * from test_

There is a relational database with three basic tables. The table structure is as follows: table 1 student no. stu_id name age gender No. depart_id Table 2. SC student no. stu_id course No. course_code score Table 3. courseWww.2cto.com course No.

To start or stop a service in oracle in linux, you must have sysdba permissions. Two methods can be used for connection: first, connect to c: \> sqlplus sys/change_on_install as sysdba; Second: www.2cto.com C: \> sqlplus/nolog SQL> connect/as sysdba

Copy install oracle10g for AIX5.3 www.2cto.com #! /Usr/bin/kshx () {chdev-l aio0-P $ * if [$? = 0] then dspmsg smit. cat-s 25 763 'changes will become valid tive at next lead E m restart' fi} x-a minservers = '30'-a maxservers = '60'-a autoconfig = '

When the oracle system is busy, quickly locate 1. Check the current number of connections select count (*) from gv $ session; www.2cto.com 2. Here we are the bs architecture, let's take a look at the general situation of the session for the

(PL/SQL) basic operations 1. function. To improve the system performance, the database storage module is required so that you can create a stored procedure (SQL window) from the basic application www.2cto.com 1) create or replace procedure

Create an ASM With Oracle 10G. Since the subsequent demonstration operations will use the ASM instance, create a simple ASM instance at the beginning of the article, and then introduce the ASM in detail. The specific procedure for creating an ASM

Restrictions on the Use of sequence objects in Oracle NEXTVAL and CURRVAL are only valid in SQL statements and not directly valid in SPL statements. (However, SQL statements using NEXTVAL and CURRVAL can be used in SPL routines) The following

There are two simple examples of exists, not exists, and in usage in Oracle to illustrate the efficiency of "exists" and "in" 1) select * from T1 where exists (select 1 from T2 where T1.a = T2.a); T1 has a small amount of data, while T2 has a large

Oracle-background processLGWR: writes log entries in log_buffer from log_buffer to log files. After writing, log_buffer space is released. The server process writes SQL commands of every user to log buffer, log entries are not simple SQL statements,

The auto-incrementing field sequence created by Oracle is not as convenient as the auto-incrementing SEQUENCE in SQL Server. If you want to achieve the effect in SQL Server, it is not very troublesome. You need to create an auto-incrementing

Oracle maintenance, monitoring, and optimization of common SQL 1) SQL monitoring www.2cto.com SELECT SE. sid, schemaname, SE. serial #, PR. spid, SE. status, SUBSTR (SE. program, 1, 10) PROG, SUBSTR (SE. machine, 1, 10) MACH, SQ. SQL _text FROM v $