ALTER TABLE column_constraint (Transact-SQL) [!INCLUDE sql-asdb-asdbmi-fabricsqldb] Specifies the properties of a PRIMARY KEY, FOREIGN KEY, UNIQUE, or CHECK constraint that is part of a new column ...

ALTER TABLE index_option (Transact-SQL) [!INCLUDE sql-asdb-asdbmi-fabricsqldb] Specifies a set of options that can be applied to an index that is part of a constraint definition that is created by ...

When you alter the attributes of a column and an index has been defined for that column, the values in the altered column continue to have the index defined for them. If you drop a column with the ...

A database consists of one or more tables. A table is identified by its name. A table is made up of columns and rows. Columns contain the column name and data type. Rows contain the records or data ...