Sql - Alter Statement

Data System Architecture


alter is a sql statement that modify the schema of a relational object.

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Data System Architecture
SQL - As clause

The as sql clause renames a relation or the attribute of a relation. This is a runtime operation and does not rename a table or a column. To rename a table or a column, the alter statement should be...
Data System Architecture
SQL - Schema (Metadata)

A SQL schema is two things: It'is a persistent, named collection of metadata (known as information_schema) that defines a schema a scope because a schema is part of the object identifier. A SQL Schema...

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