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Praefatio

Contrarium munus est munus processus chordae communiter adhibitum, quod in multis programmatibus linguarum praesto est. In recenti evolutione inveni necessitatem aversa solvendam.

Introductio ad munera fundamentalia

SELECT reverse(string_column) FROM table_name;
1

Exemplum:

SELECT reverse('hello world');
1

Consequens est:
dlrow olleh

Ipsam pugnam

Sunt currently tres agri, id nomen, usoris, ac cura ID iunctura.

Exsecutio:

with temp_test as 
(
    select '1458963' as userid ,'小花'  as  user_name ,'[1,5,8]' as favsid
    union all 
    select '1258963' as userid ,'小明'  as  user_name ,'[3,7,9,10]' as favsid 
    union all  
    select '3245895' as userid ,'小翠'  as  user_name ,'[]' as favsid  
)


select 
userid
,user_name
,reverse(split(favsid,'\,')[0]) as favsid
from  
(select 
userid
,user_name
,regexp_replace(reverse(favsid),'\[|\]','') as favsid
from  temp_test
) tt 
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Effectus est talis: