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Comparar Tabelas (Postgres)


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Boa tarde!

Preciso de comparar valores q se encontram em tabelas distintas...

Por exemplo,

Tabela1 :

id | Data

1  |01092009

2  | 23072005


id  | Dia | Mes | Ano

1  | 01  |  09 |  2009

4  |12    | 02  |  2020

e neste caso queria comparar as datas e verificar quais sao iguais... Qual a melhor forma de o fazer?  ?

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Tens que converter os dados da segunda tabela numa string.

Tens aqui um exemplo de como obter o resultado que queres em SQL Server:

declare @T1 table(
id int,
data varchar(20)

declare @T2 table(
id int,
dia tinyint,
mes tinyint,
ano smallint

insert into @T1 values (1, '01092009')
insert into @T1 values (2, '23072005')

insert into @T2 values (1, 1,9,2009)
insert into @T2 values (2, 12,2,2020)

select b.id, b.dia, b.mes, b.ano
from @T1 a inner join @T2 b
on a.data = REPLICATE('0', 2 - LEN(b.dia)) + cast(b.dia as varchar(2)) +
		REPLICATE('0', 2 - LEN(b.mes)) + cast(b.mes as varchar(2)) +
		REPLICATE('0', 4 - LEN(b.ano)) + cast(b.ano as varchar(4))

Matraquilhos para Android.

Gratuito na Play Store.


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