Oracle

Where exists 2The basic select usage was previously described in terms of personal understanding. Of course, exists is more than just a select. For example, update can also use where existsTo continue the previous explanation, I saw from the

ReasonAfter some verification, found that the source of the problem is not on the plsql, but on our Oracle, because our Oracle database character set does not support the Chinese cause, since we know the reason, it is good to do, we configure our

Create userCreate user username identified by password default tablespace temporary tablespace temporary table space;View table Space SizeSelect Tablespace_name, sum (bytes)/1024/1024 from Dba_data_files Group by Tablespace_name;View table space and

1. First we can log in to Oracle as SYSDBA as a Scott user.Conn Scott/tiger as sysdba2. Then I'll be able to create the user.Create user Zzg identified by zzg123; 3. Create a good user we can then modify the user's password.Alter user ZZG identified

Today in the company encountered a paged query bug, query the first page can query to the data, the following also shows no problem! When I query the second page, the display has finished loading, but the page is not a problem!Debug debugging, found

Operating EnvironmentOracle Linux Server Release 6.4KernelLinux Rac1 2.6.39-400.17.1.el6uek.x86_64[Email protected] ~]# vi/etc/sysconfig/network-scripts/ifcfg-bond0Device=bond0Bootproto=staticipaddr=192.168.254.2netmask=255.255.255.0broadcast=192.168

This article for the learning process of personal experience and summary, non-authoritative, only for reference sharingOracle database, currently one of the mainstream databases, why is one of the mainstream database, there are some mainstream

1 DML (Data manipulation language) data manipulation Language2 for adding, deleting, and changing data in a database3Often accompanied by Tcl (things operating language)----commit (save); rollback (rollback);4 Create TableStu (ID Number(5),

There are two scenarios for solving this problem:One: To recover according to time:1, query the current time of the database (the purpose is to check whether the database time is similar to your computer time, to avoid different time and restore

Oracle Index Details (i) # # #--Index introduction?? Indexing is very important for Oracle learning, and using just the right index in the case of a huge amount of data will result in a significant reduction in data query time and a general

Oracle Tablespace (tablespaces)We know that the Oarcle database actually holds the data file (data files), and theoarcle tablespace (tablespaces) is actually a logical concept, He does not exist physically, so a set of data files can be a table

1. Execute Sql:select COUNT (distinct ID) from BW_FPZXX, with the following error:Ora-01578:oracle Data Block Corruption (file number 16, block number 195428)ORA-01110: Data file: '/DISK01/HWXX09.DBF '01578.00000-"ORACLE data block corrupted (file #%

The installation directory is assumed to be #solr_home, and the #solr_home for this article is APPS/SVR/SOLR1. Create a new folder under #solr_home/server/solr, assuming MJD2. Copy the Conf folder under #solr_home/server/solr/configsets/_default to

--View the single table structure of an Oracle databaseSelect Dbms_metadata.get_ddl (' TABLE ', ' table_name ') from dual;There are two parameters in parentheses, the first parameter is the object we want to query, here is the table structure, so it

Javama: summaryHttps://www.cnblogs.com/joeblackzqq/archive/2011/03/19/1988915.htmlFirst of all: Baidu above the search information, are garbage information, and examples are copied each other, there is no reference value,The most annoying is the

Use rules for using keywords in Oracle:1. The query must be an equivalent connection.2. The columns in the equivalent join must have the same name and data type.There are a few things to keep in mind when simplifying connections with the Using

Primary users and their roles in Oracle databases No. User name Default password Describe 1 Sys Change_on_install Super Administrator of the database 2 System Manager

1--1. Creating a Test Table 2 CREATE TABLE job_test (ID integer,add_time date); 3 4--2. Creating a Stored procedure5 Create or Replace procedurePrc_job_test is 6 begin 7 Insert intoJob_testValues(Seq_tm_id.nextval, sysdate); 8 Commit; 9

1.Oracle ArchitecturePart One: Memory level>SGA (Shared pool, data buffer, log buffer)> Core process (Pmon Process Monitor/smon System Monitor/DBWR (write process) LGWR log write process CKPT checkpoint)Part Two: HDD levelFiles: Log files, data

Prior to Oracle 9i, the sorting of Chinese was by default sorted by 2-binary encoding. Several new options were added at 9i: Sort by Chinese pinyin: Schinese_pinyin_m Sort by Chinese radicals: schinese_radical_m Sort by Chinese