SQL for Database Construction
The SQL ALTER statement can be used to:

change the table data.
add rows to the table.
delete rows from the table.
change the table structure.

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SQL for Database Construction
When using the SQL INSERT statement:

rows can be modified according to criteria only.
rows cannot be copied in mass from one table to another only.
rows can either be inserted into a table one at a time or in groups.
rows can be inserted into a table only one at a time only.

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