Question

我试图弄清楚这个SQL语句有什么问题。这是在我尝试添加到名为v3的数据库的过程结束时，上面定义了geneSymbolIn。我在最后WHERE上收到错误，说这是意外的。

FROM (SELECT Probe_gene, logFC, adj_P_Value, gene, Study_ID, Group1, Group2  FROM v3.degContrastList WHERE gene = geneSymbolIn) AS CL,
    (SELECT Study_ID, Disease, PMID, Time_Point, Treatment, Raw_Data FROM v3.degContrastListExperiment) AS ET, 
    WHERE CL.Study_ID = ET.Study_ID;

Answer 1

这不是一个有效的SELECT语句，official docs在描述正确的语法方面做得非常好。

Answer 2

如果您正确格式化代码，很明显您的代码出了什么问题。

FROM (
    SELECT Probe_gene, logFC, adj_P_Value, gene, Study_ID, Group1, Group2  
    FROM v3.degContrastList 
    WHERE gene = geneSymbolIn
) AS CL,
(
    SELECT Study_ID, Disease, PMID, Time_Point, Treatment, Raw_Data 
    FROM v3.degContrastListExperiment
) AS ET, 
WHERE CL.Study_ID = ET.Study_ID;

首先，没有SELECT声明。其次，在WHERE之前有一个逗号。

Answer 3

假设您的FROM语句前面有SELECT。

别名ET之后和WHERE子句之前还有一个额外的逗号不正确。

FROM (SELECT Probe_gene, logFC, adj_P_Value, gene, Study_ID, Group1, Group2  
      FROM v3.degContrastList 
      WHERE gene = geneSymbolIn) AS CL,
     (SELECT Study_ID, Disease, PMID, Time_Point, Treatment, Raw_Data 
      FROM v3.degContrastListExperiment) AS ET
WHERE CL.Study_ID = ET.Study_ID;

FROM子句SQL中的嵌套SELECT语句

3 个答案: