oracle table fields

Oracle updates the fields of another table with the fields of one table. During the project process today, we found that many of the fields in a table in the Development Library are empty, while the values of this field in the Test Library are. So,

1. Create a table with Oracle:Sql> Create TableLoginuser (2Id Number(Ten,2), 3Usernamevarchar( -), 4Passwordvarchar( -), 5Emailvarchar( -), 6Descriablevarchar2( $), 7RegDate date);Syntax for creating tables:CREATE TABLE table_name (

Oracle CBO RBO Detailed url:http://blog.163.com/love-love-l/blog/static/21078304201010175035270/ Http://blog.csdn.net/cnham/archive/2010/04/13/5482318.aspx First part What is Table analysis. Simply put, it is the information that collects tables

This article mainly describes the Oracle table add field, delete table fields to modify the use of table, please refer to the use of itSyntax for adding a field: ALTER TABLE tablename Add (column datatype [default value][null/not null],....);Modify

Sometimes, because of project development, some tables in the SQLServer2005 must be synchronized to the Oracle database, which can be read by other systems. Data synchronization between different database types can be implemented using linked

In Oracle, fields of the lob (large object, large object) type are increasingly used. This type of field has a large capacity (up to 4 GB of data), and a table can have multiple fields of this type, which is flexible, applicable to business areas

In the process of doing the project today, it is found that a field in a table in the development library has many values that are empty, while the value of the field in the test library is there.So, what is the way to update the value of the field

View All Tables, fields, and Table comments in Oracle. Obtain the table with field comments: selecttable_namefromuser_tables; select Table owned by the current user View All Tables, fields, and Table comments in Oracle. Obtain the table using field

At work: After adding a field to a table, add a new field at the end, you want to adjust the position of the new field.1, the original method:--Create a new temporary table to store the correct orderCreate TableA_2 as Select(Column1,colum2,......

Get table name:  Oracle's user_talbes is used to record user table information. Select * From user_tables  Obtain the fields of a table: User_tab_cols records the column information of the User table. The following is what others