classmate synonym

1. Why use synonyms:Synonyms, as the name implies, are the same as the meaning of two words, can be replaced with each other. What is its role?A one of the most obvious goals is to simplify SQL. If a database object's name is too long, you can create a shorter synonym. It is equivalent to an abbreviation.B. Another goal is to hide information about some objects. For example, to find a table in another schema, you need to prefix the table name with the

pathDbalist = "tianlesoftware@vip.qq.com, tianlesoftware@hotmail.com"; export dbalist Sqlplus-s '/As sysdba' Set feed offSet heading offColumn owner format A10Column object_name format A35Column object_type format A10Column status format A10Spool invalid_object.alertSelect owner, object_name, object_type, status from dba_objects where status = 'invalid' order by owner, object_type, object_name;Spool offExitEOFIf ['cat invalid_object.alert | WC-l'-GT 0] ThenMailx-s "invalid objects for pprd10" $

Oracle Database Synonyms I. Definition A synonym is an alias for a database solution object. The database solution objects here refer to tables, views, sequences, stored procedures, packages, and so on. 2. Benefits of synonyms 1. No memory space occupied, saving a lot of database space 2. simplified access to database objects 3. Improved Database Object Access Security 4. the extended scope of use of databases enables seamless interaction between dif

Excerpt: Oracle --- synonym, sequence, View /* ===================================================== ======================================= *//* Synonym: product_define *//* ===================================================== ======================================= */Create synonym product_define for pc_prod_main Introduce the

Exit EOF If [' Cat Invalid_object.alert | wc-l '-GT 0] then mailx-s "Invalid OBJECTS for PPRD Ten "$DBALIST Fi $ more Invalid_object.alertPublic all_wm_locked_tables synonym INVALIDPublic all_wm_versioned_tables synonym INVALIDPublic dba_wm_versioned_tables synonym INVALIDPublic sdo_cart_text synonym INVALIDPubli

Label:View and other object operationsExperimental purpose (1) Grasp the establishment of the view, query, modify, delete operations. (2) to master the establishment of synonyms, query, modify, delete operations, compare the operation of the synonym to the original database object is consistent with the operation. (3) Mastering sequence Establishment, query, modification, delete operation, using the sequence to insert data into the database table. 　　

of the parent class, which is why we can still use Parent::method () for the method of overriding the parent class in the subclass. It is also important to note that self always points to the class itself where the declaration is located and that parent always points to the class that declares the location, and is not affected by the inheritance context.These are probably some people already know, above said:: In PHP called the scope parsing operator, I said above since, both parent and self ca

I. background There are two sid: Asid and Bsid. There are two users Auser1 and Auser2 under Asid, and there is a user Buser1 under Bsid. Among them, Auser2 and Buser1 establish dblink. You want to log on to Buser1 to access three tables table1, table2, table3, and function function1 on auser1. Step 2 ① Log on to Auser1 and authorize Auser2 (add delete if delete is required) Grant insert, select, update on table1 to Auser2; Grant insert, select, update on table2 to Auser2; Grant insert, select, u

Synonym CREATE [PUBLIC] SYNONYM synonym For schema. object Hide the Object Name and owner: Select count (*) from hr. employees; Create synonym emp for hr. employees; -- by default, it belongs to the donny user and is the private object of donny. Select count (*) from emp; Provides location transparency for remote objec

Tags: Io for SP data on cti bs Database SQL Oracle synonyms literally mean aliases. Similar to the view function, they are a ing relationship. Maintenance of users in Oracle is maintained by permissions. That is to say, if we want to use the database, we must have permissions, but if someone else grants us the permissions, we can also perform operations on the database, but it is the name of the user who wants to authorize the table, such as bsrun.doc tor_info, so this is troublesome. What shou

"." V_dnport "PermissionsNote: When querying with northbound log in, add DNINMSV31 to the view before the report or view does not exist.For example:SELECT * from DNINMSV31. V_dndevice; --Can execute normallySELECT * from DNINMSV31. Tb_device where rownum3) Login User viewUse northbound users to create synonyms for the other company system to access:CREATE synonym V_dndevice for DNINMSV31. V_dndevice;CREATE synony