Mysql SQL：如何将大量列和大量表中的特定值连接到一个查询中？

我对SQL有点生疏（如果其他地方已经回答了这个问题，我表示歉意，尽管我似乎找不到任何可以解决这个问题的方法），并且在这个问题上被难住了很久。作为前言，我已经研究并了解了各种连接和内部连接等，我了解它们是如何工作的，并且它们似乎在较小的数据量下工作得很好。但是，我的问题是列和表的数量太多，我需要知道是否有更简单的方法将这些数据连接到一个查询中

这就是我所拥有的：

 $query2 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase1 WHERE id IN(3,12,22)";
    $query3 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase2 WHERE id IN(3,12,22)";
    $query4 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase3 WHERE id IN(3,12,22)";
    $query5 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase4 WHERE id IN(3,12,22)";
    $query6 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase5 WHERE id IN(3,12,22)";
    $query7 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase6 WHERE id IN(3,12,22)";
    $query8 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase7 WHERE id IN(3,12,22)";
    $query9 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase8 WHERE id IN(3,12,22)";
    $query10 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase9 WHERE id IN(3,12,22)";
    $query11 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase10 WHERE id IN(3,12,22)";
    $query12 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase11 WHERE id IN(3,12,22)";
    $query13 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase12 WHERE id IN(3,12,22)";

我想将这些查询结果合并到一个查询中。我曾尝试在phase1、phase2 e.t、c之间使用简单的逗号分隔，但我遇到了一个不明确的列错误。我理解这是因为我没有补充

phase1.fen_toit

或

等等来选择，因为这看起来太长了

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如果有人能帮忙，我将不胜感激。我确信答案就在眼前

使用

UNION

或

UNION ALL

加入您的查询，如下所示：

$query2 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase1 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase2 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase3 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase4 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase5 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase6 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase7 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase8 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase9 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase10 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase11 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase12 WHERE id IN(3,12,22)";

---

因此，下一步请参见normalization使用

UNION

组合它们。您还可以使用

MERGE

存储引擎创建一个表，该表在所有这些表之间自动执行

UNION

。

$query2 = "SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase1 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase2 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase3 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase4 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase5 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase6 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase7 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase8 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase9 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase10 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase11 WHERE id IN(3,12,22)
             UNION ALL
           SELECT fen_toit,tuiles,zinc,bois,bac_acier FROM phase12 WHERE id IN(3,12,22)";