SQL Question

[rodders45]

How, using SQL, do you insert a new field into a table in an Access database which already exists without deleting the table and creating a new one?

[parksie]

Use ALTER TABLE.

[rodders45]

How exactly do you use ALTER TABLE?

[parksie]

This is from the documentation:

ALTER [IGNORE] TABLE tbl_name alter_spec [, alter_spec ...]

alter_specification:
ADD [COLUMN] create_definition [FIRST | AFTER column_name ]
or ADD [COLUMN] (create_definition, create_definition,...)
or ADD INDEX [index_name] (index_col_name,...)
or ADD PRIMARY KEY (index_col_name,...)
or ADD UNIQUE [index_name] (index_col_name,...)
or ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}
or CHANGE [COLUMN] old_col_name create_definition
or MODIFY [COLUMN] create_definition
or DROP [COLUMN] col_name
or DROP PRIMARY KEY
or DROP INDEX index_name
or RENAME [AS] new_tbl_name
or table_options


So to add a field:

ALTER TABLE <table> ADD COLUMN (<type>)

[rodders45]

cheers :)