select replace('aaaa','a','b');
select replace('aaaa','aa','b');
select replace('aaaa','a','bb');
select replace('aaaa','','b');
select replace('bbbb','a','c');
select replace(concat(lower(concat('THIS',' ','IS',' ','A',' ')),upper('false'),' ','test'),'FALSE','REAL') ;
select replace('北京涛思','北京', '');
select replace('北京涛思','涛思', '');
select replace('北京涛思.com','思.', '北京');
select replace('北京涛思.com','北com', '北京涛');
select replace('北京涛思', char(ascii('北')), 'wrongans');
select replace(nch1, 'a', 'b') from ts_4893.meters order by ts limit 5;
select replace(nch1, 'a', 'b') from ts_4893.meters where position('a' IN nch1) != 0 order by ts limit 5;
select replace(nch1, 'a', 'b') from ts_4893.meters where position('a' IN nch1) = 0 order by ts limit 5;
select replace(nch1, 'a', '啊') from ts_4893.meters order by ts limit 5;
select replace(nch1, 'a', '啊') from ts_4893.meters where position('a' IN nch1) != 0 order by ts limit 5;
select replace(nch1, 'a', '啊') from ts_4893.meters where position('a' IN nch1) = 0 order by ts limit 5;
select replace(nch1, '一', '壹') from ts_4893.meters order by ts limit 5;
select replace(nch1, '一', '壹') from ts_4893.meters where position('一' IN nch1) != 0 order by ts limit 5;
select replace(nch1, '一', '壹') from ts_4893.meters where position('一' IN nch1) = 0 order by ts limit 5;
select replace(nch1, '一', '1') from ts_4893.meters order by ts limit 5;
select replace(nch1, '一', '1') from ts_4893.meters where position('一' IN nch1) != 0 order by ts limit 5;
select replace(nch1, '一', '1') from ts_4893.meters where position('一' IN nch1) = 0 order by ts limit 5;
select replace(nch1, nch2, 'nch2') from ts_4893.meters order by ts limit 5;
select replace(nch1, nch2, 'nch2') from ts_4893.meters where position(nch2 IN nch1) != 0 order by ts limit 5;
select replace(nch1, nch2, 'nch2') from ts_4893.meters where position(nch2 IN nch1) = 0 order by ts limit 5;
select replace(nch1, var2, 'var2') from ts_4893.meters order by ts limit 5;
select replace(nch1, var2, 'var2') from ts_4893.meters where position(var2 IN nch1) != 0 order by ts limit 5;
select replace(nch1, var2, 'var2') from ts_4893.meters where position(var2 IN nch1) = 0 order by ts limit 5;
select replace(nch1, '三', nch2) from ts_4893.meters order by ts limit 5;
select replace(nch1, '三', nch2) from ts_4893.meters where position('三' IN nch1) != 0 order by ts limit 5;
select replace(nch1, '三', nch2) from ts_4893.meters where position('三' IN nch1) = 0 order by ts limit 5;
select replace(nch1, '三', var2) from ts_4893.meters order by ts limit 5;
select replace(nch1, '三', var2) from ts_4893.meters where position('三' IN nch1) != 0 order by ts limit 5;
select replace(nch1, '三', var2) from ts_4893.meters where position('三' IN nch1) = 0 order by ts limit 5;
select replace(nch1, nch2, var2) from ts_4893.meters order by ts limit 5;
select replace(nch1, nch2, var2) from ts_4893.meters where position(nch2 IN nch1) != 0 order by ts limit 5;
select replace(nch1, nch2, var2) from ts_4893.meters where position(nch2 IN nch1) = 0 order by ts limit 5;
select replace(nch1, var2, nch2) from ts_4893.meters order by ts limit 5;
select replace(nch1, var2, nch2) from ts_4893.meters where position(var2 IN nch1) != 0 order by ts limit 5;
select replace(nch1, var2, nch2) from ts_4893.meters where position(var2 IN nch1) = 0 order by ts limit 5;
select replace(var1, 'a', 'b') from ts_4893.meters order by ts limit 5;
select replace(var1, 'a', 'b') from ts_4893.meters where position('a' IN var1) != 0 order by ts limit 5;
select replace(var1, 'a', 'b') from ts_4893.meters where position('a' IN var1) = 0 order by ts limit 5;
select replace(var1, 'a', '啊') from ts_4893.meters order by ts limit 5;
select replace(var1, 'a', '啊') from ts_4893.meters where position('a' IN var1) != 0 order by ts limit 5;
select replace(var1, 'a', '啊') from ts_4893.meters where position('a' IN var1) = 0 order by ts limit 5;
select replace(var1, '一', '壹') from ts_4893.meters order by ts limit 5;
select replace(var1, '一', '壹') from ts_4893.meters where position('一' IN var1) != 0 order by ts limit 5;
select replace(var1, '一', '壹') from ts_4893.meters where position('一' IN var1) = 0 order by ts limit 5;
select replace(var1, '一', '1') from ts_4893.meters order by ts limit 5;
select replace(var1, '一', '1') from ts_4893.meters where position('一' IN var1) != 0 order by ts limit 5;
select replace(var1, '一', '1') from ts_4893.meters where position('一' IN var1) = 0 order by ts limit 5;
select replace(var1, nch2, 'nch2') from ts_4893.meters order by ts limit 5;
select replace(var1, nch2, 'nch2') from ts_4893.meters where position(nch2 IN var1) != 0 order by ts limit 5;
select replace(var1, nch2, 'nch2') from ts_4893.meters where position(nch2 IN var1) = 0 order by ts limit 5;
select replace(var1, var2, 'var2') from ts_4893.meters order by ts limit 5;
select replace(var1, var2, 'var2') from ts_4893.meters where position(var2 IN var1) != 0 order by ts limit 5;
select replace(var1, var2, 'var2') from ts_4893.meters where position(var2 IN var1) = 0 order by ts limit 5;
select replace(var1, '三', nch2) from ts_4893.meters order by ts limit 5;
select replace(var1, '三', nch2) from ts_4893.meters where position('三' IN var1) != 0 order by ts limit 5;
select replace(var1, '三', nch2) from ts_4893.meters where position('三' IN var1) = 0 order by ts limit 5;
select replace(var1, '三', var2) from ts_4893.meters order by ts limit 5;
select replace(var1, '三', var2) from ts_4893.meters where position('三' IN var1) != 0 order by ts limit 5;
select replace(var1, '三', var2) from ts_4893.meters where position('三' IN var1) = 0 order by ts limit 5;
select replace(var1, nch2, var2) from ts_4893.meters order by ts limit 5;
select replace(var1, nch2, var2) from ts_4893.meters where position(nch2 IN var1) != 0 order by ts limit 5;
select replace(var1, nch2, var2) from ts_4893.meters where position(nch2 IN var1) = 0 order by ts limit 5;
select replace(var1, var2, nch2) from ts_4893.meters order by ts limit 5;
select replace(var1, var2, nch2) from ts_4893.meters where position(var2 IN var1) != 0 order by ts limit 5;
select replace(var1, var2, nch2) from ts_4893.meters where position(var2 IN var1) = 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', nch2, 'nch2') from ts_4893.meters order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', nch2, 'nch2') from ts_4893.meters where position(nch2 IN '一二三四五六七abcdefghijk213124123') != 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', nch2, 'nch2') from ts_4893.meters where position(nch2 IN '一二三四五六七abcdefghijk213124123') = 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', nch2, var2) from ts_4893.meters order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', nch2, var2) from ts_4893.meters where position(nch2 IN '一二三四五六七abcdefghijk213124123') != 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', nch2, var2) from ts_4893.meters where position(nch2 IN '一二三四五六七abcdefghijk213124123') = 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', var2, 'var2') from ts_4893.meters order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', var2, 'var2') from ts_4893.meters where position(var2 IN '一二三四五六七abcdefghijk213124123') != 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', var2, 'var2') from ts_4893.meters where position(var2 IN '一二三四五六七abcdefghijk213124123') = 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', var2, nch2) from ts_4893.meters order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', var2, nch2) from ts_4893.meters where position(var2 IN '一二三四五六七abcdefghijk213124123') != 0 order by ts limit 5;
select replace('一二三四五六七abcdefghijk213124123', var2, nch2) from ts_4893.meters where position(var2 IN '一二三四五六七abcdefghijk213124123') = 0 order by ts limit 5;
select replace('aabbccdd','aa', 'ee');
select replace('aabbccdd','AA', 'ee');
select replace('北京','北' , '南');
select replace('北京','京' , '南');
select replace('北京taos','北' , '南');
select replace(nch1, nch2, 't') from ts_4893.d0 order by ts limit 10;
select replace(nch1, nch2, 't') from ts_4893.meters order by ts limit 10;
select replace(nch1, var2, 't') from ts_4893.d0 order by ts limit 10;
select replace(nch1, var2, 't') from ts_4893.meters order by ts limit 10;
select replace(var1, nch2, 't') from ts_4893.d0 order by ts limit 10;
select replace(var1, nch2, 't') from ts_4893.meters order by ts limit 10;
select replace(var1, var2, 't') from ts_4893.d0 order by ts limit 10;
select replace(var1, var2, 't') from ts_4893.meters order by ts limit 10;
select replace(nch1, nch2, var1) from ts_4893.d0 order by ts limit 10;
select replace(nch1, nch2, var1) from ts_4893.meters order by ts limit 10;