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过滤另一个我有2个表如何列出在表中的所有项目通过在MySQL
表1 = visitacli
codcli-char(3)
nomecli-varchar(100)
------------------------
001 - Joao
002 - Maria
003 - Joana
表2 = visitaate
codcli-char(3)
datavisita-char(8)
quantidade-integer
-------------------------
001 - 20170810 - 2
001 - 20170811 - 3
001 - 20170815 - 5
002 - 20170812 - 1
002 - 20170816 - 9
我的选择
SELECT
visitacli.codcli,
visitacli.nomecli,
Sum(visitaate.quantidade) AS totalvisitas
FROM
visitacli
LEFT JOIN visitaate ON visitacli.codcli = visitaate.codcli
WHERE
visitaate.datavisita >= '20170801'
AND visitaate.datavisita <= '20170817'
GROUP BY
visitacli.codcli,
visitacli.nomecli
结果:
001 - Joao - 10
002 - Maria - 10
但是......没有列出003 - Joana
。 如何使用表2的总数列出表1中的所有项目?