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《MySQL必知必會》學習筆記-聯結

  • 使用WHERE子句+完全限定列名
    mysql> SELECT vend_name, prod_name, prod_price
    -> FROM vendors, products
    -> WHERE vendors.vend_id = products.vend_id
    -> ORDER BY vend_name, prod_name;
    ±------------±---------------±-----------+
    | vend_name | prod_name | prod_price |
    ±------------±---------------±-----------+
    | ACME | Bird seed | 10.00 |
    | ACME | Carrots | 2.50 |
    | ACME | Detonator | 13.00 |
    | ACME | Safe | 50.00 |
    | ACME | Sling | 4.49 |
    | ACME | TNT (1 stick) | 2.50 |
    | ACME | TNT (5 sticks) | 10.00 |
    | Anvils R Us | .5 ton anvil | 5.99 |
    | Anvils R Us | 1 ton anvil | 9.99 |
    | Anvils R Us | 2 ton anvil | 14.99 |
    | Jet Set | JetPack 1000 | 35.00 |
    | Jet Set | JetPack 2000 | 55.00 |
    | LT Supplies | Fuses | 3.42 |
    | LT Supplies | Oil can | 8.99 |
    ±------------±---------------±-----------+