• SELECT column_names [,... n] FROM Table_1 LEFT JOIN Table_2 ON condition
  • SELECT column_names [,... n] FROM Table_1 RIGHT JOIN Table_2 ON condition 8.3– rasm. Right outer join
  • SELECT column_names [,... n] FROM
    		•

    SELECT column_names [,... n]




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    SELECT
    column_names [,... n]
    FROM
    Table_1 INNER JOIN Table_2
    ON condition


    8.1 – rasm. Inner join operatorining Venn diagrammasi orqali ko‘rinishi

    1. SQL LEFT JOIN operatorining 1 jadval va 2 jadvalning 1 jadvalda mos elementlarini qo‘shadi.

    SQL LEFT JOIN operatorining sintaksisi quyidagi ko‘rinishda bo‘ladi:




    SELECT
    column_names [,... n]
    FROM
    Table_1 LEFT JOIN Table_2
    ON condition


    8.2 – rasm. Left outer join operatorining Venn diagrammasi orqali ko’rinishi



    1. SQL RIGHT JOIN operatorining 2 jadval va 1 jadvalning 2 jadvalda mos elementlarini qo`shadi.

    SQL RIGHT JOIN operatorining sintaksisi quyidagi ko`rinishda bo`ladi:




    SELECT
    column_names [,... n]
    FROM
    Table_1 RIGHT JOIN Table_2 ON condition


    8.3– rasm. Right outer join operatorining Venn diagraamsi orqali ko’rinishi



    1. CROSS JOIN operatori 1 jadvaldagi xar bir element uchun 2 jadvaldagi elementlarni bog‘lab chiqadi.

    SQL CROSS JOIN operatorining sintaksisi quyidagi ko‘rinishda bo‘ladi:




    SELECT column_names [,... n] FROM

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    Download 1.63 Mb.