9
9
select 'hello',"'hello'",'""hello""','''h''e''l''l''o''',"hel""lo",'hel\'lo';
11
11
select length('\n\t\r\b\0\_\%\\');
12
13
select char_length('\n\t\r\b\0\_\%\\');
14
14
select length('\n\t\n\b\0\\_\\%\\');
15
15
select concat('monty',' was here ','again'),length('hello'),char(ascii('h')),ord('h');