要使用SQL的LEFT JOIN进行左连接,可以按照以下步骤进行操作:
SELECT A.column1, B.column2
FROM table1 A
LEFT JOIN table2 B ON A.id = B.id
ON A.id = B.id
WHERE A.column3 = 'value'
综合起来,完整的LEFT JOIN查询语句如下所示:
SELECT A.column1, B.column2
FROM table1 A
LEFT JOIN table2 B ON A.id = B.id
WHERE A.column3 = 'value'
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推荐阅读:SQL中LEFT JOIN的语法解析