英文:
How can i change column variable type in MySql workbench?
问题
I was working on a database. then I set the data type of a simple place to INT. I want to change this. I need VARCHAR. how can I do it?. Can you help me to do this through Workbench or Python codes?
我正在处理一个数据库。然后我将一个简单位置的数据类型设置为INT。我想更改这个。我需要VARCHAR。我该如何做呢？你能帮我通过Workbench或Python代码来做吗？
I searched a bit on the internet and looked through the documentation but I couldn't
我在互联网上进行了一些搜索并查看了文档，但我找不到解决方法。
I don't know much about MySQL. I only know simple things.
我对MySQL了解不多，我只知道一些简单的东西。
英文:
I was working on a database. then I set the data type of a simple place to INT. I want to change this. I need VARCHAR. how can I do it?. Can you help me to do this through Workbench or Python codes?
I searched a bit on the internet and looked through the documentation but I couldn't
I don't know much about MySQL. I only know simple things
答案1
得分: 1
如果您想在MySQL Workbench中更改列的数据类型，可以右键单击表格，然后选择Alter Table。您将看到所有可用列及其相应数据类型的列表，可以在那里进行更改。单击Apply将生成ALTER TABLE查询，然后您可以应用它。
如果您想通过查询手动更改数据类型，可以像这样操作：
ALTER TABLE `table_name` CHANGE COLUMN `field_name` `field_name` VARCHAR(100);
请注意，如果您尝试存储出生日期，最好使用Datetime数据类型来定义列。根据您编写代码的语言，您将可以访问一个日期时间变量，并可以按照您想要的任何方式进行格式化。
英文:
If you are trying to change the datatype of a column in MySQL Workbench you can right-click your table and select Alter Table.
You will have a list of all available columns and their respective datatypes, which you will be able to change there. Clicking on Apply will generate the ALTER TABLE query which you can then apply.
If you want to change the datatype manually through a query you can do something like:
ALTER TABLE `table_name` CHANGE COLUMN `field_name` `field_name` VARCHAR(100);
Note that if you are trying to store a date of birth, it will be easier to use the Datetime datatype for your column. Depending on the language you're coding it, you will have access to a datetime variable which you will be able to format in any way you'd like.
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