how to change field name in sql

Create a table:Create table [table name]([Automatic number field] int IDENTITY (1, 1) primary key,[Field 1] nVarChar (50) default 'default value 'null,[Field 2] ntext null,[Field 3] datetime,[Field 4] money null,[Field 5] int default 0,[Field 6]

Create a table:Create table [table name]([Automatic number field] int IDENTITY (1, 1) primary key,[Field 1] nVarChar (50) default 'default value 'null,[Field 2] ntext null,[Field 3] datetime,[Field 4] money null,[Field 5] int default 0,[Field 6]

New table:CREATE table [table name](AutoNumber field int IDENTITY (1,1) PRIMARY KEY,[Field 1] nVarChar default ' defaults ' null,[Field 2] ntext null,[Field 3] datetime,[Field 4] money null,[Field 5] int default 0,[Field 6] Decimal (12,4) default 0,[

Modify the table name and field name in an SQL statement.   Today, we have a temporary task to modify the database table name and field name in the production environment. In the past, the field names of the table names to be modified were all in

In the reconstruction of the site, the data structure is usually modified, so add, delete, add the MySQL table field is unavoidable, and sometimes for convenience, but also increase the modification of the table or field comments, the same field

In the reconstruction of the site, the data structure is usually modified, so add, delete, add the MySQL table field is unavoidable, and sometimes for convenience, but also increase the modification of the table or field comments, the same field

In mysql, we only need to use alter to modify the data table fields. Below I will introduce how to modify the table field name, field length, and field type in mysql, for more information, see. Let's take a look at common methods. The simple Syntax

To modify the field type and field name in SQL Server --Here is the complete SQL execution statement if exists (SELECT * from syscolumns where id=object_id (' datasheet name ') and name= ' field name ')--determine if the field exists Begin Alter

In the reconstruction of the site, the data structure is usually modified, so add, delete, add the MySQL table field is unavoidable, and sometimes for convenience, but also increase the modification of the table or field comments, the same field

No more nonsense to say, the details are as follows: 1. Modify the table name Format: sp_rename tablename,newtablename 2. Modify Field Name Format: sp_rename ' Tablename.colname ', Newcolname, ' column ' 3. Add fields