WHERE clause

      +
      The WHERE clause filters resultsets based specified conditions.

      Purpose

      When you want to narrow down your resultset by one or more criteria, use the WHERE clause to filter your resultset.

      For example, list airports in France, detailed in Example 1:

      SELECT airportname, city, country
      FROM `travel-sample`.inventory.airport
      WHERE country = "France"
      LIMIT 4;

      Syntax

      where-clause ::= WHERE cond
      where clause

      Arguments

      cond

      [Required] Conditional expression that represents a filter to be applied to the resultset. Records for which the condition resolves to TRUE are propagated to the resultset.

      You can construct complex conditional expressions, for example by using the logical operators AND, OR, and NOT.

      Examples

      Example 1. Use WHERE filter the resultset

      To list only airports that are in France, use the WHERE clause for the "country" field.

      SELECT airportname, city, country
      FROM `travel-sample`.inventory.airport
      WHERE country = "France"
      LIMIT 4;
      Results
      [
        {
          "airportname": "Calais Dunkerque",
          "city": "Calais",
          "country": "France"
        },
        {
          "airportname": "Peronne St Quentin",
          "city": "Peronne",
          "country": "France"
        },
        {
          "airportname": "Les Loges",
          "city": "Nangis",
          "country": "France"
        },
        {
          "airportname": "Couterne",
          "city": "Bagnole-de-l'orne",
          "country": "France"
        }
      ]
      Example 2. Use WHERE and OR to filter the resultset

      List only the landmarks that start with the letter "C" or "K". Note that the first position of the SUBSTR function is 0.

      SELECT name
      FROM `travel-sample`.inventory.landmark
      WHERE CONTAINS(SUBSTR(name,0,1),"C")
         OR CONTAINS(SUBSTR(name,0,1),"K")
      LIMIT 4;
      Results
      [
        {
          "name": "City Chambers"
        },
        {
          "name": "Kingston Bridge"
        },
        {
          "name": "Clyde Arc"
        },
        {
          "name": "Clyde Auditorium"
        }
      ]
      Example 3. Use WHERE, AND and NOT to filter the resultset

      List landmark restaurants, except Thai restaurants.

      SELECT name, activity
      FROM `travel-sample`.inventory.landmark
      WHERE activity = "eat"
      AND NOT CONTAINS(name,"Thai")
      LIMIT 4;
      Results
      [
        {
          "activity": "eat",
          "name": "Hollywood Bowl"
        },
        {
          "activity": "eat",
          "name": "Spice Court"
        },
        {
          "activity": "eat",
          "name": "Beijing Inn"
        },
        {
          "activity": "eat",
          "name": "Ossie's Fish and Chips"
        }
      ]