what field size in database

All data in the database is stored in the table. Data tables include rows and columns. The column determines the data type in the table. The row contains the actual data. For example, the table authors in the database pubs has nine fields. The

Openerp objects support the following fields: Char, text, Boolean, integer, float, date, time, datetime, and binary. complex types: selection, function, and related; link Type: one2one, one2133, many2one, and many2133. The following sections

Query the size of a table with a lob field in the Oracle database Note: Because the lob field has an independent lob segment for storage, for a table with a lob field, you cannot only query dba_segments. The following scripts are from: How to

There are a lot of related to char and varchar on the Internet, but all have a long history, here reprint a piece of information relatively new, personally think to my design field decision help very much. Modern databases generally support char

Chapter 7 CIDRDelphi 4 uses tfield to manipulate fields in the dataset. However, the specific fields are actually derived classes of tfield. Therefore, tfield is rarely directly used in applications. When you open a dataset, Delphi 4 automatically

To obtain field information for a table in a database, the properties of the following Recordset object are known to be: ActualSize property: The actual size of the field. DefinedSize property: Defines the size of the field. Type property: Field

Chapter Two I. Design of distributed Database System 1 Database design Overview Database design refers to the construction of an optimal database schema for a given application environment, the establishment of a database and its

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Because the Data warehouse system stores a large amount of historical data and current data, and the data volume is increasing, in order to

Information A 1, stop the database server, the database MDF files and LDF files copy backup a copy 2, start the database server, delete the suspect database 3, only with the backup of the database MDF file attached to the database,

This blog is a little bit long, it actually includes two content: one is the description of the MySQL field type, and the second is how to correctly select these field types in the MySQL build table process; field Type value MySQL's numeric