Oracle

First, Sql*plus way:use Sql*plus to connect toOracleSqlplus/nolog starts Sql*plus without connecting to the databaseConnect/as SYSDBA is connected to Oracle as DBAStartup is ready to start.However, there are 3 types of Oracle Boot modes:L startup

ORACLE function Development1. Establish the syntax of the function: CREATE [OR REPLACE] Function function name [ (arg1 [mode] datatype[,........]) ]--when specifying the parameter data type, you cannot specify its length. Mode value: In, out, in out,

Principle: Oracle can retrieve data by placing the table at a point in time ( or SCN)before it is deleted, based on the restoration of tablespace information, using data from a restored tablespace, similar to a consistent read method.Prerequisite

Symptoms:1. TCP/IP connectivity is on-the-pass. You can test with the ping command.2. The Oracle listener on the server has been started.Lsnrctl Status View Listener stateLsnrctl Start Oracle Listener3. The error message that the client gets is

one of the pitfalls of inaccurate data types is to construct a table date field, a varchar2, a save date, and a test. I have written two blog posts before:1. Problem with field type design and actual business mismatch 12. Problem with field type

Ensure two data table structure is the same, if not the same can only synchronize the same field; Just the idea, please modify according to the requirements. Declare cursorCsrn_mon is Select * fromtable2; Row_mon

This example code, only the use of one of the commonly used methods of Oracle paging in the Web, does not involve MVC, code optimization and other things, master please drift over. Novice can refer to.-------------------------------------------------

First, row to columnThe following format is requiredConvert to:This is the most common row-to-column, the main principle is to use the Decode function, aggregation function (sum), combined with the group by group implementation of the[SQL]View

Oracle EXPDP/IMPDP Export Import command and database backupThings to be aware of when using EXPDP and IMPDP:Exp and IMP are client tool programs that can be used either on the client or on the server side.EXPDP and IMPDP are server-side utilities

Racle 10g Wmsys.wm_concat Use of the row and column conversion functions:First let's take a look at this magical function wm_concat (column name), which separates the column values by the "," number, and displays them as a line, and then the example

Oracle does not have functionality such as the Oracle self-increment field, but it can be implemented through triggers (trigger) and sequences (sequence).Let me give you an example:1. Create a table in Oracle:1. Create a table t_client (ID number (4)

Oracle does not have functionality such as the Oracle self-increment field, but it can be implemented through triggers (trigger) and sequences (sequence).Let me give you an example:1. Create a table in Oracle:1, create a tableCreate TableT_client

Using a template to build a composite partition greatly reduces the complexity of the script, the following is an experiment:--Building a composite partition without using a template methodsql> drop table test purge;Sql> CREATE TABLE Test(Owner

Select the most efficient table name order (valid only in the rule-based optimizer)the parser for Oracle processes the table names in the FROM clause in a right-to-left order, so the table that is written in the FROM clause (the underlying table,

Oracle uses a bottom-up sequential parsing where clause, according to which the connection between tables must be written before other where conditions, and those that can filter out the maximum number of records must be written at the end of the

It's you. A stored procedure creates a table table_a and then inserts the other data into the table_a with insert into, but because Table_a does not exist when you create the process, the process shows a compile error because table_ A does not

Mongolerman recovered to a remote or remote location The original database server uses rman to back up the entire database, and then restores the same database on the remote server. 1.1 The first step for the original server to back up the database

Oracle Stored Procedure + cursor processing select data Create or replacePROCEDURE UPDATE_RECORDCODE is cursor location_data is select * from location where remark in ('20160301', '20160301', '20160301'); -- declare the cursor serviceCode NUMBER: =

Oracle connect and RESOURCE role permissions, oracleconnect Recently, I was dealing with database user permissions. Previously, I thought that after the RESOURCE permission is granted to the user, the user's general permissions will be available.

Oracle11g Automatic Optimization--: Automatic Plan OptimizationBeginDbms_workload_repository.create_snapshot ();End;Select/* + result_cache */count (*) from (select * from HJ. dbtan where object_type = 'table' order by 1 DESC, 2 ASC, 3 DESC, 4 ASC );