Can we change data type of field in Salesforce?
In Salesforce Knowledge article types, the file field type can’t be converted into other data types. You cannot change the data type of a custom field referenced by other items in Setup, like Visualforce pages, Apex code, processes, or flows. Changing a custom field type may require changing many records at once.
Can you change the field type of a field if it is referenced in Apex?
You won’t be able to change the field type if: It is referenced in your Apex code or any other custom code you’ve written. It is being used in any other formula field, workflow rule, validation rule, workflow field update, process builder, lead assignment rule, case assignment rule etc.
How do I change the data type of a field?
Locate the field that you want to change, and select a new data type from the list in the Data Type column. Save your changes. As a rule, you can change the data type of all fields, except for: Number fields with the Replication ID property enabled.
How can I preserve the name of a field?
To preserve the existing data, you should change the field’s name with the table design mode of the Access user interface, or write code to preserve the current data in a temporary table and append it back to the renamed table.
How do you change a field in Excel?
In the Navigation Pane, locate and double-click the table that you want to change. Access opens the table in Datasheet view. Select the field (the column) that you want to change. On the Fields tab, in the Properties group, click the arrow in the drop-down list next to Data Type, and then select a data type.
How to add a field to an ALTER TABLE?
To add a field with the ALTER TABLE statement, use the ADD COLUMN clause with the name of the field, its data type, and the size of the data type, if it is required. To change the data type or size of a field, use the ALTER COLUMN clause with the name of the field, the desired data type, and the desired size of the data type, if it is required.