salesforce上的SQL不适用

Question

我在SQL上有这个代码，我试图在Salesforce中使用它。我收到一个错误，它无法识别JOIN功能。

以下是代码：

SELECT 
lu_table.Name, 
lu_table.id,
primary.Start_date,  
primary.end_date, 
secondary.metric
FROM primary
LEFT JOIN secondary
ON primary.xyz= secondary.xyz
LEFT JOIN lu_table
ON primary.id = lu_table.id
group by lu_table.Name;

Answer 1

Salesforce拥有名为SOQL的查询语言。该语言没有JOIN功能。这是reference

SOQL语法：

SELECT fieldList [subquery][...]
[TYPEOF typeOfField whenExpression[...] elseExpression END][...]
FROM objectType[,...] 
    [USING SCOPE filterScope]
[WHERE conditionExpression]
[WITH [DATA CATEGORY] filteringExpression]
[GROUP BY {fieldGroupByList|ROLLUP (fieldSubtotalGroupByList)|CUBE (fieldSubtotalGroupByList)} 
    [HAVING havingConditionExpression] ] 
[ORDER BY fieldOrderByList {ASC|DESC} [NULLS {FIRST|LAST}] ]
[LIMIT numberOfRowsToReturn]
[OFFSET numberOfRowsToSkip]
[FOR {VIEW  | REFERENCE}[,...] ]
      [ UPDATE {TRACKING|VIEWSTAT}[,...] ]

修改

你在SOQL中查询就是这样的。

SELECT
    Start_date,
    end_date,
    (SELECT Id, Name FROM lu_table),
    (SELECT metric FROM secondary)
FROM primary
WHERE xyz IN (SELECT xyz FROM secondary WHERE condition)
AND Id IN (SELECT id FROM lu_table WHERE condition)
GROUP BY lu_table.Name;

但我不确定这种形式的查询是否会达到SF限制