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2 Μαρ 2016 · You can't dictate the data type for the output column of a view. The best you can do is as @buckley suggested - use CAST or CONVERT to force an explicit data type inline in the view definition. –
To change the data type of a column in a table, use the following syntax: SQL Server / MS Access: ALTER TABLE table_name. ALTER COLUMN column_name datatype; My SQL / Oracle (prior version 10G): ALTER TABLE table_name. MODIFY COLUMN column_name datatype; Oracle 10G and later: ALTER TABLE table_name.
The basic syntax for the ALTER VIEW statement is as follows: ALTER VIEW view_name AS SELECT columns FROM tables WHERE conditions; Here, view_name is the name of the view that you want to alter. The SELECT statement following the AS keyword defines the new query that will be used to redefine the view. You can change the columns selected, add new ...
28 Φεβ 2023 · To change data in one or more columns, modify the data in the column. Important. You cannot delete a row if the view references more than one base table. You can only update columns that belong to a single base table. To insert a row, scroll down to the end of the rows and insert the new values. Important.
For example, if permissions are granted on the SalesOrderID column in a CREATE VIEW statement, an ALTER VIEW statement can rename the SalesOrderID column, such as to OrderRef, and still have the permissions associated with the view using SalesOrderID.
SQL Server allows you to perform the following changes to an existing column of a table: Modify the data type. Change the size. Add a NOT NULL constraint. Modify column’s data type. To modify the data type of a column, you use the following statement: ALTER TABLE table_name . ALTER COLUMN column_name new_data_type(size);
12 Δεκ 2019 · You can reference a view as the data source within insert, update, and delete statements. User-defined functions, including inline table-valued user-defined functions, return a value or values without changing underlying data already in a database.
