SQL 添加具有默认值的列 - Access 2003
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SQL to add column with default value - Access 2003
提问by Polsonby
Updating an old ASP/Access site for a client - I need SQL to add a column to an existing table and set a default value. Doesn't work - any ideas?
为客户端更新旧的 ASP/Access 站点 - 我需要 SQL 将一列添加到现有表并设置默认值。不起作用 - 有什么想法吗?
This works fine
这工作正常
ALTER TABLE documents ADD COLUMN membersOnly NUMBER
I want this to work:
我希望这个工作:
ALTER TABLE documents ADD COLUMN membersOnly NUMBER DEFAULT 0
Have googled and seen instructions for default values work for other field types but I want to add number. Thanks!
用谷歌搜索并查看了适用于其他字段类型的默认值说明,但我想添加数字。谢谢!
回答by zappan
Tools -> Options -> Tables/Queries -> (At the bottom right:) Sql Server Compatible Syntax - turn option on for this database.
工具 -> 选项 -> 表/查询 ->(在右下角:)Sql Server Compatible Syntax - 为这个数据库打开选项。
then you can execute your query:
然后你可以执行你的查询:
ALTER TABLE documents ADD COLUMN membersOnly NUMBER DEFAULT 0
回答by HansUp
With ADO, you can execute a DDL statement to create a field and set its default value.
使用 ADO,您可以执行 DDL 语句来创建字段并设置其默认值。
CurrentProject.Connection.Execute _
"ALTER TABLE discardme ADD COLUMN membersOnly SHORT DEFAULT 0"
回答by Polsonby
How are you connecting to the database to run the update SQL? You can use the ODBC compatible mode through ADO. Without opening the database in Access.
您如何连接到数据库以运行更新 SQL?您可以通过 ADO 使用 ODBC 兼容模式。无需在 Access 中打开数据库。
回答by mike nelson
You may find Sql Server Compatible Syntax is already turned on, so definately worth just trying to run the sql statement mentioned above (via an ADO connection from ASP) before resorting to taking the db offline. Thanks, this helped me out.
您可能会发现 Sql Server Compatible Syntax 已经打开,因此在使 db 脱机之前,绝对值得尝试运行上面提到的 sql 语句(通过来自 ASP 的 ADO 连接)。谢谢,这帮了我。
回答by user3921919
Tools -> Options -> Tables/Queries -> (At the bottom right:) Sql Server Compatible Syntax - turn option on for this database.
工具 -> 选项 -> 表/查询 ->(在右下角:)Sql Server Compatible Syntax - 为这个数据库打开选项。
is not found on MS Access 2010
在 MS Access 2010 上找不到