Ms Access Vba Create Temporary Table
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You can drop a temporary table using DROP TEMPORARY TABLE IF EXISTS. This does not drop the table if it has been created using CREATE TEMPORARY TABLE... LIKE. Only a temporary table created using CREATE TEMPORARY TABLE can be dropped. If you want to drop a table that was created using CREATE TEMPORARY TABLE... LIKE, you must first drop the underlying tables. For example, if you first created a table TEMPORARY using CREATE TABLE TEMPORARY like this:
A temporary table is not dropped if it has been created using CREATE TEMPORARY TABLE or if it has been created using CREATE TEMPORARY TABLE LIKE. This is because they are used to create a table that is the result of some previous operation and that can therefore not be dropped.
The table TEMPORARY is dropped when the session or transaction in which it was created is committed. The temporary table will be dropped when it is no longer referenced by an operation that is part of the transaction.
If a temporary table has been created using user_name@host, and the host is no longer available, or the user name has been removed from the account, the table is dropped. The table will not be dropped if the user_name@host is a local temporary table.
Certain SQL statements, such as DELETE and UPDATE, update the definition of the referenced table rather than the temporary table; for example, DELETE deletes the rows from the base table and then deletes the entries in the temporary table that are based on the base table's data. Therefore, you must first drop the temporary table when you are finished using it. You can safely use DROP TEMPORARY TABLE as a separate statement.
The temporary table can be dropped using DROP TEMPORARY TABLE. This drops the table just as if you had used the DROP TABLE statement. The table is dropped at the end of the current session or transaction.
The following example creates a temporary table TMP1 and then uses it to perform some operations. The example creates a view that acts as a proxy for the temporary table, just as if it were a table:
You cannot use CREATE TEMPORARY TABLE to create a temporary table that has identical columns to one or more permanent tables in the same database. If you use CREATE TEMPORARY TABLE to create a temporary table with columns that match the columns of a table in the same database, the CREATE TEMPORARY TABLE action creates a new table and inserts it into the database. This is not permitted.
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