parameter global_name=true requires that the database link name is the same as the remote database name. The database global name can be isolated with the following command
--select * from Global_name;
3. Query data:
--querying, deleting, and inserting data is the same as manipulating the local database, except that the table name needs to be written as "table name @dblink Server".
Select xxx from table name @ database link name;
4. Delete DBLink
Drop/ * pub
) (HOST = 192.168.0.1) (PORT = 1521))) (Connect_data = (SERV Ice_name = ORCL)) ';
--Database parameter Global_name=True requires that the database link name is the same as the remote database name. The database global name can be isolated with the following command
--select * from Global_name;
drop database link to_test;Create DATABASE link To_test connect to dbzy_20140903 identified by dbzy_20140903 using ' (DESCRIPTION = (address_lis T = (ADDRESS = (PROTOCOL = TCP) (HOST = 1
The concept of synonyms:Synonyms are aliases of Oracle objects and use synonyms to access the same objectsYou can create synonyms for objects such as tables, views, stored procedures, functions, or another synonymEasy access to other users ' objects, hiding the identity of the objectShorten the length of the object nameSynonym creation Syntax: CREATE [public] synonym synonym_name for object;Permissions to create and delete synonyms:
CREATE
"Administrative Tools", or "Netstop w32time", "net start W32Time" can be entered in DOS.Step three: Set the computer's Windows Time service to start automatically. Complete in the "services" interface of the "Administrative Tools".Note This Windows host cannot join any domain, or the Windowstime service cannot be started. At this point, the Windows computer is already the client of the main time server on the Internet, and each time the computer starts, it will automatically
Most of the network game servers will choose the non-blocking Select this structure, why? Because the network game server needs to deal with a lot of connections, and most will choose to run under Linux/unix, it is actually very uneconomical to open a thread for each user, on the one hand, because the thread under Linux/unix is simulated with the concept of a process, Compared to the consumption of system resources, in addition to I/O, each thread basically does not have any unnecessary parallel
first, and then put the words on the shelf. You can select the words by the sorter. After the words are selected, the samples are printed first, just like printing a sample copy before a newspaper is delivered to a printing factory." Mr. Xu said, "it takes a lot of time and effort to proofread the sample. If you want to delete a few words during the verification, all the leading words will move forward one by one, it's like hitting a domino card. Thi
CHAR () is a binary string. You can use the USING statement to generate a string in the given character set:
Mysql> select charset (CHAR (0x65), CHARSET (CHAR (0x65 USING utf8 ));
Mysql> select charset (CHAR (0x65), CHARSET (CHAR (0x65 USING utf8); + ----------------------- + ---------------------------- + | CHARSET (CHAR (0x65 )) | CHARSET (CHAR (0x65 USING utf8) | + ----------------------- + ------------------------------ + | binary | utf8 | + --------------------- + bytes + if USING has been
EBS multi-OU and multi-account customization implementation (I) Multi-OU Summary 1. form multiple OU Implementation 1) create a Table, take CUX_AP_CHECK_HEADER_ALL as An Example 2) create two Synonym tables (one excluding _ ALL and one ending with _ ALL): CUX_AP_CHECK_HEADER and CUX_AP_CHECK_HEADER_ALL3) to Synonym: CUX_AP_CHEC without _ ALL
EBS multi-OU and multi-account customization implementation (I) Mu
utf8); mysql> select charset (CHAR (0x65 )), CHARSET (CHAR (0x65 USING utf8); + ----------------------- + ------------------------------ + | CHARSET (CHAR (0x65) | CHARSET (CHAR (0x65 USING utf8 )) | + --------------------- + ------------------------------ + | binary | utf8 | + ----------------------- + ------------------------------ +
If USING has been generated and the result string does not conform to the given character set, a warning is issued. Similarly, if the strict SQL mode is activat
characters given by the code values of these integers. The NULL value is omitted.Convert all parameters into characters and connect them together.
5. CHAR_LENGTH (str)The return value is the length of the str string, measured in characters.
6. CHARACTER_LENGTH (str)CHARACTER_LENGTH () is a synonym for CHAR_LENGTH.
7. COMPRESS (string_to_compress)Compress a string.
8. CONCAT (str1, str2 ,...)Returns the string generated by the connection parameter.
9.
I recently reviewed the OracleSQLPLUS official document and introduced the PUP mechanism in the SQLPLUSSecurity chapter. Here, I will use the following: PUP (PRODUCT_USER_PROFILE)
I recently reviewed the official Oracle SQLPLUS documentation and introduced the PUP mechanism in the SQLPLUS Security chapter. Here, I will use the following: PUP (PRODUCT_USER_PROFILE)
I recently reviewed the official Oracle SQLPLUS documentation and introduced the PUP mechanism in the SQLPLUS Security chapter.
1. Introduce How to Use synonyms to access the same object: (1) convenient access to objects of other users (2) shorten the length of object names; 2. create synonyms SQLgt; create
1. Introduce How to Use synonyms to access the same object: (1) convenient access to objects of other users (2) shorten the length of object names 2. create synonyms SQLgt; create
1. Introduction
Use synonyms to access the same object:
(1) convenient access to other user objects
(2) Shorten the Object Name L
Being good is a habit, life is a process, giving up is a kind of wisdom, and its disadvantage is a kind of favor.
A synonym error occurs when the base table or view is deleted.
ORA-01775: Looping chain of synonyms
Cause: through a series of create synonym statements, a synonym was defined that referred to itself.
Action: change one
; SELECT CHARSET (char (0X65)), CHARSET (char (0x65 USING UTF8));
Mysql> SELECT CHARSET (char (0X65)), CHARSET (char (0x65 USING UTF8)); +---------------------+----------------------- ---------+| CHARSET (CHAR (0x65)) | CHARSET (CHAR (0x65 USING UTF8)) |+---------------------+--------------------------------+| binary | UTF8 |+---------------------+--------------------------------+ if the using has been generated and the result string does not conform to the given character set, a police alert i
verification:
1. Create a table under the Gyj User:
Gyj@ocm> CREATE TABLE emp as select Employee_id,first_name,manager_idfrom hr.employees;
Table created.
2. Create a common synonym E
gyj@ocm> create public synonym E for emp;
Synonym created.
Gyj@ocm> select * from E;
employee_id first_name manager_id
----------- -------------------- ----------
198 Don
parse any table, index, and cluster in the database
Audit any set auditing options for any database object
Audit system allows systems to operate audits
Backup any table to back up permissions on any of the tables
Become user's permission to switch users state
Commit any table permission to submit tables
Create any cluster permissions for creating a cluster for any user
Create any index permissions for creating an index for any user
Create any procedure permissions for creating stored procedure
whose return value is a string containing the characters given by the code value of those integers. Null values are omitted.All parameters are concatenated after they are converted to characters.5.char_length (str)The return value is the length of the string str, and the length of the unit is a character.6.character_length (str)Character_length () is a synonym for Char_length ().7.COMPRESS (string_to_compress)Compresses a string.8.CONCAT (STR1,STR2,.
of synonyms1. Simplifying SQL statements2. Hide the name and owner of an object3. Remote objects with a bit of distributed database provide location transparency4. Providing public access to objects2.3.2 Synonyms Classification2.3.2.1 Private synonyms1. Create syntax:CREATE [OR REPLACE] synonym [schema.] Synonym_name---> Synonym namesfor [schema.] object_name---> Replace this
modify table spacesAlter user to modify permissions for usersAnalyze using the Analyze command to parse arbitrary tables, indexes, and clusters in the databaseAudit any set auditing options for any database objectAudit system Operation Audit allowedBackup any table permissions to back up any tablesBecome user permissions to switch users stateCommit any table permission to submit tablesCreate any cluster permissions for creating clusters for any userCreate any index permissions for creating inde
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