Oracle

Oracle if else if statement was written to the Oracle stored procedure some time ago. originally written as www.2cto.com if 1 = 2 then null; elseif 1 = 3 then nullend if; In the PL/SQL editing environment, elseif does not change color, indicating

Obtain the id of the current session in the login trigger (or during the process) v $ mystat how to obtain the id of the current session in the login trigger ??? Www.2cto.com 1. an error occurred while using UserEnv ('sessionid') in the logon

Oracle Study Notes database to obtain random n records recently in the company's Internet of vehicles service system, met a demand, need to obtain random n records from the database. I have referred to the solution provided in SQL cookbook. I will

Oracle remote database connection configuration introduction Oracle Database remote connection can be achieved through a variety of methods, this article we mainly introduce four remote connection methods and precautions, and through examples to

Oracle10 ora-12154 error solution to install oracle10 client, configure the network service name, connect to the server with the sie manager console, everything is normal, the connection is successful. Www.2cto.com and then install plsql developer,

Oracle SQL Test 1 SQL code www.2cto.com id sname smoney sprovince 1 zhangsan 2098 A 2 lisi 3000 B 3 wangwu 6789 C 4 liumazi 4587 C 5 dongjiu 3298 B 6 shiga 4567 A id: contract id sname: Name smoney: Performance sprovince: Region create table test

Use oracle dynamic SQL syntax for dynamic SQL in oracle: Excute immediate dynamic SQL statement using binding parameter list returning into output parameter list; www.2cto.com describes this statement as follows: 1) dynamic SQL refers to DDL and

Oracle 4 equivalent SQL code www.2cto.com SELECT COUNT (1) FROM (SELECT k001 FROM (SELECT k001 FROM kbib GROUP BY k001) k where not exists (SELECT 1 FROM (SELECT k003 FROM calb group by k003) c WHERE k. k001 = c. k003) select count (1) FROM (SELECT

The set commands commonly used in oracle are available only in the command line. windows key + R: Open the row. On www.2cto.com -- set the number of characters displayed in each row SQL> set linesize 4000; -- set the number of lines displayed on

Oracle Installation problem (win7) solution &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& & www.2cto.com Command = D: \ Program Files \ Oracle \ jdk \ jre \ bin/java.exe-Dsun. java2d. noddraw = true-Duser. dir = D: \ Program Files \ Oracle \ bin-classpath "

An analysis of the evolution of the RAC architecture from a single instance to RAC. The architecture is also built by the RAC cluster and Clusterware cluster. (1) The significant changes of SGA www.2cto.com SGA are saved by a GRD: ① PCM Lock

The typeid field of the oracle keyword table is not long ago. When you import the oracle database, you cannot create a table because it contains a field named after the oracle keyword. Www.2cto.com: How was the table created successfully? With

Oracle constraints and index constraints www.2cto.com constraints include: not null, unique, primary key, foreign key, check not null (non-null). If not null is defined on the column, when inserting data, you must provide the data unique (unique)

Oracle tablespace query settings select s. tablespace_name, round (sum (s. bytes/1024/1024), 2) as Space, round (sum (s. bytes/1024/1024)-nvl (d. fr, 0), 2) used, nvl (round (d. fr, 2), 0) free, decode (round (sum (s. maxbytes/1024/1024/1024), 2), 0,

In Oracle, how does one merge two tables with different columns and different rows into one? SQL: www.2cto.com select s. stagename sname, sum (nworkhours) nworkhours, sum (OVERHOURS) OVERHOURS, sum (nworkhours + OVERHOURS) from T_WorkDetails w,

ORACLE default account unlock Problem description: After Oracle10g is installed, use scott/tiger to test, the following error message will appear: oracle10g the account is locked oracle10g the password has expired www.2cto.com cause: scott of Oracle1

Oracle RAC startup sequence process owner -- Process ---- log location www.2cto.com $ LOG_HOME = $ GRID_HOME/log/hostname/root ----/etc/init. d/init. ohasd run --- $ LOG_HOME/ohasd. log root ----- orarootagent. bin ------ $ LOG_HOME/agent/ohasd root

Basic Oracle peripheral performance optimization 1. modify the number of database connection processes the default number of connections in Oracle is 150, but often cannot meet our project requirements, especially in environments with extremely high

In oracle, this parameter is used to specify the default path for creating data files on the Oracle Database Server. In addition to data files, it is said that you can also create other default paths for files such as log files and control files,

After the server is replaced with the hard disk, Oracle can be started normally after the Oracle cannot be connected. However, the Listner cannot be started, so applications and clients cannot connect to the database. After some searching and