Oracle中动态SQL拼接

1. 直接用单引号，单引号的使用是就近配对，即就近原则。从第二个单引号开始被视为转义符
v_sql := \' insert into  BJTONGRENTANGTEMPTB  select distinct h.sellerid,h.sellercode,h.sellername,h.prodcode,h.prodname from historyofsales_day h \'
||\' where h.sellerid in (select distinct ovalorgid from bjtongrentangpc ) \'
||\' and h.prodcode in (select prodcode from buproduct where bucode= \'\'\'||v_bucode||\'\'\')\'
||\' and to_char(h.salesdate,\'\'yyyyMM\'\') =\'\'\' || v_year||v_month||\'\'\'\';
if v_productcode is not null then
  v_sql := v_sql || \' and h.prodcode = \'\'\'||v_productcode||\'\'\'\';
end if;
if v_seller is not null then
  v_sql := v_sql || \' and h.sellername like \'\'%\'||v_seller||\'%\'\'\';
end if;
if v_provincecode is not null then
  v_sql := v_sql || \' and h.buyerprovincecode = \'\'\'||v_provincecode||\'\'\'\';
end if;
if v_productspec is not null then
  v_sql := v_sql || \' and h.prodspec like \'\'%\'||v_productspec||\'%\'\'\';
end if;
execute immediate v_sql;
commit;

2. 利用chr(39)转义单引号
v_sql := \' insert into  BJTONGRENTANGTEMPTB  select distinct h.sellerid,h.sellercode,h.sellername,h.prodcode,h.prodname from historyofsales_day h \'
||\' where h.sellerid in (select distinct ovalorgid from bjtongrentangpc ) \'
||\' and h.prodcode in (select prodcode from buproduct where bucode= \'||chr(39)||v_bucode||chr(39)||\')\'
||\' and to_char(h.salesdate,\'\'yyyyMM\'\') =\' ||chr(39)|| v_year||v_month||chr(39);
if v_productcode is not null then
  v_sql := v_sql || \' and h.prodcode = \'||chr(39)||v_productcode||chr(39);
end if;
if v_seller is not null then
  v_sql := v_sql || \' and h.sellername like \'||chr(39)||\'%\'||v_seller||\'%\'||chr(39);
end if;
if p_provincename is not null then
  v_sql := v_sql || \' and h.buyerprovincename = \'||chr(39)||p_provincename||chr(39);
end if;
if v_productspec is not null then
  v_sql := v_sql || \' and h.prodspec like \'||chr(39)||\'%\'||v_productspec||\'%\'||chr(39);
end if;

3. 利用execute immediate using占位符语法处理
v_sql := \' insert into  BJTONGRENTANGTEMPTB  select distinct h.sellerid,h.sellercode,h.sellername,h.prodcode,h.prodname from historyofsales_day h \'
||\' where h.sellerid in (select distinct ovalorgid from bjtongrentangpc ) \'
||\' and h.prodcode in (select prodcode from buproduct where bucode= :1)\'
--||\' and to_char(h.salesdate,\'\'yyyyMM\'\') =:2:3\';
||\' and to_char(h.salesdate,\'\'yyyy\'\') =:2\';
 
--execute immediate v_sql using v_bucode,v_year,v_month; --error  ORA-01006：绑定变量不存在
execute immediate v_sql using v_bucode,v_year;
commit;

4. 其他的
select q\'[it\'s a cat]\' from dual;

转自 https://blog.csdn.net/qiuzhi__ke/article/details/81014821