once synonym

It used to be that the synonym (synonym) in SQL Server was useless, so it never looked up its syntax format. Today, there is a problem, with synonym to solve the better. The problem is that I use multiple databases in my system, and because some of

Database objects include tables, views, sequences, indexes, and synonyms. The tables and views are learned in the previous notes. Database objects, that is, sequences, indexes, and synonyms. Sequence: provides regular values. Database objects that

I. Common database objectsSecond, sequenceSequence: A database object that can be used by multiple users to produce unique values Automatically provide a unique value Shared objects Primarily used to provide primary key values

1. Sequence (sequence)sequence : A collection of database objects that can be used by multiple users to produce unique valuesAutomatically provide unique valuesShared objectsMainly used for primary key self-incrementLoading sequence values into

Nine precautions for using Oracle9i Database OracleHTTPServer in Oracle Database 9.2.0.1.0 has the following changes: 1. the maximum number of ApacheJserv processes supported by the ApacheJserv process OracleHTTPServer has increased from the default

The Oracle HTTP Server in Oracle Database 9.2.0.1.0 has the following changes: I. About the Apache JServ Process The maximum number of Apache JServ processes supported by Oracle HTTP Server has been increased from the default value 25 released by

oracle| Data | database Nine major considerations for using the Oracle9i database Oracle HTTP Server in the 9.2.0.1.0 version of Oracle database has the following changes: First, about the Apache Jserv process The maximum number of Apache Jserv

oracle| Data | The Oracle HTTP server in the 9.2.0.1.0 version of the database Oracle database changes as follows: First, about the Apache Jserv process The maximum number of Apache Jserv processes supported by Oracle HTTP Server has been

1. create and manage tables1. Create Table syntaxCreate table Name (column datatype [default expr] [, column...])Default Constraints2. Create a table using subqueryCreate table NameAsSelect * from u tableIi. modify a table1. Add a new columnOracle:

First, create and manage tables1. CREATE TABLE syntax CREATE TABLE table name (column datatype [default Expr][,column ...]) The description of default constraint is slightly 2, use the subquery to create the table CREATE TABLE Table name As SELECT *