[帮助文档] Dataphin的SQL任务中使用leftjoin报错:"ODPS-0130071:[4,4]Semanticanalysisexception-expectequalityexpression(i.e.,onlyuse'='and'AND')forjoinconditionwithoutmapjoinhint"
问题描述Dataphin的SQL任务中使用left join时报错:“ODPS-0130071:[4,4] Semantic analysis exception - expect equality expression (i.e., only use '=' and 'AND') for join...
图解SQL的inner join、left join、right join、full outer join、union、union all的区别
SQL的Join语法有很多,inner join(等值连接) 只返回两个表中联结字段相等的行,left join(左联接) 返回包括左表中的所有记录和右表中联结字段相等的记录,right join(右联接) 返回包括右表中的所有记录和左表中联结字段相等的记录,看到一篇图解文章,非常清楚简洁的说明了使...
sql:inner join,left join,right join,full join的用法及含义
join的语法如下: select [字段] from [表名1] inner/left/right/full join [表名2] on [表名1.字段1] <关系运算符> [表名2.字段2] cross join:是笛卡儿乘积,在...
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