select CHAR(77)
select CHAR(77.5)
select CHAR(100)
select CHAR(77) from ts_4893.meters limit 5
select CHAR(77,78,79,80,81) from ts_4893.meters limit 5
select CHAR(77*256+77) from ts_4893.meters limit 5
select concat(CHAR(77),CHAR(78)) from ts_4893.meters limit 5
select cast(CHAR(49) as int)
select CHAR(id + 77) from ts_4893.meters order by ts limit 5;
select CONCAT(CHAR(id + 77),CHAR(id + 77),CHAR(id + 77)) from ts_4893.meters limit 5
select CHAR(id+77, id+77, id+77, id+77, id+77) from ts_4893.meters limit 5
select char(77)
select char(77 * 256 + 77)
select char('123')
select char(77, NULL, '123')
select char(null)
select char('ustc')
select char(65.99)
select char(65, 66, 67)
select char(72, 101, 108, 108, 111)
