A FROM clause specifies a table in a
table expression that is formed from one or more tables.Syntax
<from_clause> ::= FROM <from_table_spec>,...
from_table_specExplanation
The from clause specifies a table. This table can be derived from several base, view, and result tables (see
Table). The number of underlying tables in a FROM clause is equal to the total number of underlying tables in each FROM TABLE specification. The number of underlying tables in a from clause must not exceed 64.The user must have the SELECT privilege for each specified table or for at least one column in the specified table.
The result of a FROM clause is a table that is generated from the specified tables as follows:
This rule describes the effect of the from clause, not its actual implementation.