plsql的数据类型，用于复杂的科学计算,32bit大小

SQL> r
1 declare
2 v_pls_integer pls_integer:=-100042578;
3 begin
4 dbms_output.put_line(to_char(v_pls_integer));
5* end;
-100042578

PL/SQL procedure successfully completed.

.

SQL> declare
2 v_binary_float binary_float:=-3548.25;
3 begin
4 dbms_output.put_line(to_char(v_binary_float));
5 end;
6 /
-3.54825E+003

PL/SQL procedure successfully completed.

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oracle plsql（一）_binary_float_binary_double