SQL语句多个表查询,inner join的用法
1. inner join(等值连接) 只返回两个表中联结字段相等的行 ① 2个表进行查询SELECT t.tab1, t.tab2,p.tab1 FROM 表1 AS t INNER JOIN 表2 AS p ON t.tab1 = p.tab1 GROUP ...
SQL语句多个表查询,inner join的用法
1. inner join(等值连接) 只返回两个表中联结字段相等的行 ① 2个表进行查询SELECT t.tab1, t.tab2,p.tab1 FROM 表1 AS t INNER JOIN 表2 AS p ON t.tab1 = p.tab1 GROUP BY t.ta...
[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...
SQL INNER JOIN 关键字 用法
SQL INNER JOIN 关键字在表中存在至少一个匹配时,INNER JOIN 关键字返回行。 INNER JOIN 关键字语法 SELECT column_name(s)FROM table_name1INNER JOIN table_name2 ON table_name1.column_n...
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