Mysql : display one field or another conditionally -


i have 2 tables :

table_in_french
- french_value

table_translated_value
- french_value
- spanish_value

i need browse table_in_french , display linked spanish value if exists or french value if there no translation available.

i have tried : 

select (case when (t1.french_value = t2.french_value) spanish_value else t1.french_value end) label table_in_french t1, table_translated_value t2;

but getting many duplicates values.

thanks in advance

try query:     select (case when (t1.french_value = t2.french_value) spanish_value else t1.french_value end) label table_in_french t1 right join table_translated_value t2 on t1.french_value = t2.french_value;

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