What is the purpose of the LEFT JOIN in SQL? The LEFT JOIN is used when it is necessary to return all data from one table, even if it does not exi...
What is the purpose of the LEFT JOIN in SQL?
The LEFT JOIN is used when it is necessary to return all data from one table, even if it does not exist in the other table.
The LEFT JOIN returns the data from the right table.
The LEFT JOIN is used to perform inner joins between tables.
a) Only statement I is correct.
b) Only statement II is correct.
c) Only statement III is correct.
d) Statements I and III are correct.
e) Statements II and III are correct.
The LEFT JOIN is used when it is necessary to return all data from one table, even if it does not exist in the other table.
The LEFT JOIN returns the data from the right table.
The LEFT JOIN is used to perform inner joins between tables.
a) Only statement I is correct.
b) Only statement II is correct.
c) Only statement III is correct.
d) Statements I and III are correct.
e) Statements II and III are correct.
💡 1 Resposta
Ed 
O objetivo do LEFT JOIN no SQL é retornar todos os dados de uma tabela, mesmo que não existam na outra tabela. O LEFT JOIN é usado para realizar junções externas à esquerda entre tabelas. A alternativa correta é a letra D, pois as afirmações I e III estão corretas.
✏️ Responder
Para escrever sua resposta aqui, entre ou crie uma conta
Outros materiais
Compartilhar