#sql%found用于dml(delete,update,insert)及select into是否真正的操作了表
SQL> desc dept;
Name                                      Null?    Type
----------------------------------------- -------- ----------------------------
ID                                                 NUMBER(38)
NAME                                               VARCHAR2(20)

SQL> declare
2 v_name varchar2(20):='zxy';
3 begin
4   delete from dept where name=v_name;
5    if sql%found then
6      dbms_output.put_line('the record deleted');
7      insert into dept values(10,'other');
8
9    end if;
10 end;
11 /
the record deleted

PL/SQL procedure successfully completed.

SQL> select * from dept;

ID NAME
---------- --------------------
10 other

#sql%rowcount用于dml及select into影响表的多少行记录
SQL> select * from dept;

ID NAME
---------- --------------------
10 other

SQL> declare
2   v_name varchar2(20):='zxy';
3 begin
4     delete from dept where name=v_name;
5     dbms_output.put_line(to_char(sql%rowcount)||' number of dept deleted');
6 end;
7 /
0 number of dept deleted

PL/SQL procedure successfully completed.

SQL>

#sql%notfound

SQL> declare
2    v_name varchar2(20):='zxy';
3 begin
4    delete from dept where name=v_name;
5     if sql%notfound then
6          dbms_output.put_line('not found the record');
7          insert into dept values(88,v_name);
8     else
9         dbms_output.put_line('table dept total records '||to_char(sql%rowcount));
10     end if;
11 end;
12 /
not found the record

PL/SQL procedure successfully completed.

SQL> select * from dept;

        ID NAME
---------- --------------------
        10 other
        88 zxy

SQL>

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隐式游标(implicit cursor)_sql%found_rowcount小操作

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