Oracle

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such as SQL:Select Zyxdm from table where bindid=2265254The result of the query is: 1|4|8| 9|10Turn this query result into multiple rows, and the result is as follows:ID148910SQL to convert:With CTE1 as (select Zyxdm from table where bindid=2265254)

(1) First you need to download instantclient (unzip below), modify your Instantclient/network/admin/tnsnames.ora file, write your Oracle server addressTnsnames.ora File Contentscs_de_o= (DESCRIPTION = ( address_list = ( ADDRESS = (PROTOCOL =

Basic command management and operation of Oracle databaseStart the database650) this.width=650; "src=" https://s3.51cto.com/wyfs02/M02/97/53/wKioL1ktT9jRlsYbAAVEvLNNTas771.jpg "style=" float : none; "title=" 1.jpg "alt=" Wkiol1ktt9jrlsybaavevlnntas77

Analyze table TableName compute statistics;Analyze index IndexName compute statistics;(Analyze does not rebuild the index)When you encounter a query or other performance that is not good for the current table, you can analyze the corresponding table

Table test DataSELECT * FROM Test ORDER BY name DescResults:1-1:select * FROM (select A.*,rownum rn from Test A order by name ASC) where RN between 0 and 10Results:1-2:select * FROM (select A.*,rownum rn from Test A ORDER by name Desc) where RN

ORACLE10I,ORACLE11G,ORACLE12C, other i,g,c What do you mean?I (Internet) internetg (GRID) gridC (Cloud) cloudWhat does sqlplus mean?is an Oracle-brought client-side tool that is designed to connect to the server for SQL operations through a

First, before we talk about Plsql develope connect to Oracle database configuration, let's talk about what to do if you don't have to plsql develope to connect to the Oracle database, which is to install the Oracle database natively, but this is a

Character functionsMathematical functionsDate functionConversion functionsTo_char (number/date) is the conversion of a date or number to a string Convert a number to a specified format To_char (1210.73,'9999.9')--would return ' 1210.7

Assume that you are using an Oracle database. So hibernate's mapping file. Hbm.xml For example the following:This ID is not generated by the database itself, it needs to be noted, and the fields must correspond to the entity class, and the

1. Database Creation UserReference blog: Connect to a database using Oracle Sqldeveloper and create usersReference Blog: Oracle database-Build library, build table space, build users2. Table SpaceView Table SpacesSelect * from

For Oracle. Whether you are connecting to a local database or a remote connection server database, you need to configure network services on your computer to connect.You may not be clear why.Take SQL Server first. SQL Server only needs to enter the

Authorization principle: Principle of least privilegeEmpower users with roles to simplify administrator administrative privilegesBusiness account creation:To create a specific table space:CREATE tablespace TBS1 datafile '/U01/APP/ORACLE/ORADATA/PROD4

--Modify the Oracle database character set to Utf-8: sql>conn/as sysdba; Sql>shutdown immediate; Sql>startup Mount; Sql>alter system enable restricted session; Sql>alter system set job_queue_processes=0; Sql>alter system set

This is my first blog ~In 2017-06-23, my project was off-the-shelf due to a power outage in the project, which resulted in a database server being hung up. This interface is displayed after a restart in the morning after the discovery of a toggle

1, look for redundant records in the table, duplicate records are based on a single field (ID) to determineSELECT * FROM table where Id in (select ID from table group Byid have count (Id) > 1)2, delete redundant records in the table, duplicate

--Analysis TableDbms_stats.gather_table_stats--stored procedures for statistical tables(Ownnamevarchar2, TabNamevarchar2, PartNamevarchar2 default NULL, Estimate_percent Number defaultTo_estimate_percent_type (Get_param ('estimate_percent')),

--Querying table InformationXxx_tables--contains basic descriptive and statistical information for a tableXxx_tab_columns--contains descriptive and statistical information for the columns in the tableXxx_all_tables--contains all the relationship

Tag:oracle   dba    role permissions     1. View All users:   select * from dba_users;  select * from all_users ;   select * from user_users;2. To view user or role system permissions (System permissions that are directly assigned to a user or role)

1. Configuring MonitoringListener.oraSid_list_listener =(Sid_list =(Sid_desc =(Sid_name = Clrextproc)(Oracle_home = ORACLE path \product\11.2.0\dbhome_1)(program = Extproc)(Envs = "extproc_dlls=only:oracle path