license Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ...
-- UNIQUE constraint is to maintain data integrity. It ensures that no two rows in a table have the same value in the specified column(s) ...
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 ...
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