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mySQL alter table on update, current timestamp - Stack Overflow After MODIFY COLUMN col_name the syntax requires a column_definition which in turn requires a type Add the current type of this column (e g DATETIME) before DEFAULT to resolve the syntax error
SQL ALTER TABLE Statement - W3Schools The ALTER TABLE statement is used to add, delete, or modify columns in an existing table The ALTER TABLE statement is also used to add and drop various constraints on an existing table
Why cant I use ALTER to set the default on a column? Long story short, I have a table with a TIMESTAMP column where I want to make the default CURRENT_TIMESTAMP (default currently is 1971-01-01 00:00:00) This is part of a WordPress plugin, and so performance is important here
Db2 12 - Db2 SQL - ALTER TABLE statement - IBM If an ALTER TABLE statement with an ADD COLUMN clause that specifies a default value is successful, you cannot request a subsequent point-in-time recovery to a time that precedes processing of the ALTER TABLE statement
Alter table add new field ON UPDATE CURRENT_TIMESTAMP Please read "How to Answer" and "Explaining entirely code-based answers" It helps more if you supply an explanation why this is the preferred solution and explain how it works
ALTER TABLE … ALTER COLUMN | Snowflake Documentation This topic describes how to modify one or more column properties for a table using an ALTER COLUMN clause in a ALTER TABLE statement The following table describes the supported unsupported actions for modifying column properties:
SQL ALTER TABLE Statement In this tutorial, you'll learn how to use the SQL ALTER TABLE statement to change the structure of an existing table
ALTER TABLE | Databricks Documentation To alter a STREAMING TABLE, use ALTER STREAMING TABLE If the table is cached, the command clears cached data of the table and all its dependents that refer to it
SQL ALTER TABLE: A Complete Guide | Database Star: Home You can't add a primary key using the MODIFY COLUMN command because this is done using the ALTER TABLE ADD PRIMARY KEY syntax You can actually add all kinds of constraints using this syntax