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  1. w3schools.com
    https://www.w3schools.com › sql › sql_isnull.asp

    SQL ISNULL (), NVL (), IFNULL () and COALESCE () Functions

    SQL IFNULL (), ISNULL (), COALESCE (), and NVL () Functions Look at the following "Products" table: ... Suppose that the "UnitsOnOrder" column is optional, and may contain NULL values. …

  2. w3schools.com
    https://www.w3schools.com › Sql › exercise.asp

    W3Schools Exercise

    I completed a SQL exercise on w3schools.comYou completed the SQL NULL Functions Exercises from W3Schools.com

  3. w3schools.com
    https://www.w3schools.com › SQL › sql_stored_procedures.asp

    SQL Stored Procedures - W3Schools

    W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, …

  4. w3schools.com
    https://www.w3schools.com › sql › sql_case.asp

    SQL CASE Expression - W3Schools

    W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, …

  5. w3schools.com
    https://www.w3schools.com › mysql › mysql_ifnull.asp

    MySQL IFNULL () and COALESCE () Functions - W3Schools

    MySQL IFNULL () and COALESCE () Functions Look at the following "Products" table:

  6. w3schools.com
    https://www.w3schools.com › xml › xsl_apply_templates.asp

    XSLT <xsl:apply-templates> Element - W3Schools

    The <xsl:apply-templates> element applies a template rule to the current element or to the current element's child nodes.

  7. w3schools.com
    https://www.w3schools.com › .. › html

    HTML Tutorial - W3Schools

    Learn HTML with W3Schools' free tutorials, references, and exercises for web development. Covers HTML basics, tags, and advanced topics.

  8. w3schools.com
    https://www.w3schools.com › csS › css_align.asp

    CSS Horizontal & Vertical Align - W3Schools

    W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, …

  9. w3schools.com
    https://www.w3schools.com › python › python_functions.asp

    Python Functions - W3Schools

    Python Functions A function is a block of code which only runs when it is called. A function can return data as a result. A function helps avoiding code repetition.

  10. w3schools.com
    https://www.w3schools.com › SQL › sql_orderby.asp

    SQL ORDER BY Keyword - W3Schools

    The SQL ORDER BY The ORDER BY keyword is used to sort the result-set in ascending or descending order.