Oracle

Start and Stop the Oracle11g service in Windows. Many technical enthusiasts have installed a lot of software on their computers to solve the system slowdown, including application software, development tool software, and database software, however,

A package in oracle analyzes the basic concepts of a package. A package can organize several functions or stored procedures and store them as an object. A package usually consists of two parts: specification and body ). The program reports can also

Batch insert of oracle and mysql into oracle batch insert: insert into tableName (col1, col2, col3) select 'first column value' in the first row, 'second column value ', 'Third column value' from dual union select' first column value', 'second

The issue that ddl cannot be rolled back in oracle is raised on ITPUB. In SQL Server or some other databases, DDL statements can also be rolled back. Why cannot Oracle roll back DDL statements. This problem comes from: http://www.itpub.net/thread-130

Oracle Database Operations highlights what is the role of database tables? In relational databases, the organization, management, and use of all data are table-based. The information in the Oracle database must be stored in the table. The logical

Oracle OS Watcher installation and error handling 1. overview -------------- using oracle's osw tool, you can visually display the CPU, memory, and disk of the system. It has an intuitive effect on grasping and understanding the overall resource

CentOS 6 install Oracle 11gR2 database 1. install the [1] Software Package www.2cto.com [root @ localhost var] # yum-y install binutils compat-libstdc ++-33 elfutils-libelf-devel glibc-common glibc-devel gcc-c ++ libaio-devel libgcc libstdc ++-devel

The basic principles of Oracle TCP/IP connection here is the most common situation on the Network: a network-based connection request is recommended for TCP/IP connections. In this case, the customer is on one machine, and the server is on another

CentOS 6.3 fails to check the dependency library of Oracle 11g R2. When the dependent database is checked, multiple dependent databases fail to check, prompting that the dependency library is not installed, such as libaio and unixODBC. Check that

Oracle loop Statement 1. Exit When LOOP: www.2cto.com SQL code declare -- Local variables here I integer; begin I: = 0; LOOP Exit When (I> 5); Dbms_Output.put_line (I ); i: = I + 1; end loop; end; 2. Loop Java code declare -- Local variables here I

Oracle cascade query Java code String SQL = "select a. node_name, p. name, p. path_id, a. id, a. alarm_level,A. alarm_status, a. description,A. alarm_start from path p "+" left join alarm a on. path_id = p. path_id "+ wheresql; www.2cto.com // The

Method 1 for oracle to obtain session ip address create trigger: create orreplace trigger login_on alfterlogon on database begin dbms_application_info.set_client_info (sys_context ('userenv', 'IP _ address'); end; /www.2cto.com will automatically

Oracle memory structure Oracle's three main memory structures: System Global Area (SGA): This is a large shared memory segment, almost all Oracle processes need to access the process Global Area (PGA) in this region: this is a process or

The difference between user_tab_columns and user_tab_cols in oracle depends on the oracle metadata create or replace view sys. user_tab_columns asselect TABLE_NAME, COLUMN_NAME, DATA_TYPE, direction, direction, DATA_LENGTH, DATA_PRECISION,

Sys_connect_by_path function usage the sys_connect_by_path function is used to return the value of the hierarchy until the current row. Example: www.2cto.com SQL code select * from (select ltrim (sys_connect_by_path (id, ','), ',') id, ltrim

The regular expression in the ORACLE regexp_like function indicates that the character to be matched is a special character, constant, or referenced by the latter. (Repeat the previous match later) \ n match linefeed \ match \ (MATCH (\) Match) ^

Oracle cursor and application instance 1. For Loop cursor: Define cursor definition cursor variable use for loop use this cursor www.2cto.com 2. Example of a cursor application: SQL code declare -- defines the cursor c_job is select empno, ename,

In oracle, The next_day () function parses the SQL code. The select next_day (sysdate, 1) from dual NEXT_DAY (date, char) date parameter for the next Monday of the current system time is of the date type, char: 1 ~ 7 or Monday/Mon ~

ORACLE collection simple application instance array in ORACLE: record the same set can be implemented in three ways: www.2cto.com 1 custom a TYPE using VARRAY to get an array, but can only be defined for basic types such: create type name as varray

Common execution time of oracle jobs 1. Execute TRUNC (sysdate, 'mi ') + 1/(24*60) www.2cto.com every minute. 2. Perform regular execution every day for example: TRUNC (sysdate + 1) is executed at 08:30 every day. TRUNC (sysdate + 1) + 1/24 is