If you only want to see cities from Canada, the following SQL can be used. sqlite> SELECT agent_code, agent_name, commission Here is the result for the above statement. SELECT agent_code, agent_name, commission FROM agents WHERE commission.12 Here some operators can be used with WHERE clause. sqlite> SELECT * FROM locations WHERE country_id='CA' SELECT * FROM locations WHERE country_id='CA' If you only wanted to see cities from Canada, the following SQL can be used. It is used both to limit the number of rows returned and to indicate a relationship used to join two tables together. It provides you with a great degree of control over the conditions to impose restrictions on the dataset returned by a SELECT with which to include (or exclude) rows in (or from) the result. It sets the conditions for the SELECT, and the query will return only those rows that match the conditions. WHERE is a powerful filter A WHERE clause can let you take exactly the piece of the data you want. sqlite> SELECT * FROM locations LIMIT 5 OFFSET 4 Here is the result is same as the previous result. SELECT * FROM locations LIMIT 5 OFFSET 4 The OFFSET clause after LIMIT specifies how many rows to skip at the beginning of the result set. sqlite> SELECT * FROM locations LIMIT 4,5 If we want to retrieve five records skipping the first four from the locations table, the following SQL can be used. location_id street_address postal_code city state_province country_idġ100 93091 Calle della Te 10934 Venice ITġ200 2017 Shinjuku-ku 1689 Tokyo Tokyo Prefectu JPġ400 2014 Jabberwocky Rd 26192 Southlake Texas USġ500 2011 Interiors Blvd 99236 South San California USġ700 2004 Charade Rd 98199 Seattle Washington USġ800 147 Spadina Ave M5V 2L7 Toronto Ontario CAġ900 6092 Boxwood St YSW 9T2 Whitehorse Yukon CA If we want to retrieve the first ten records from the locations table, the following SQL can be used. When we want to retrieve a limited amount of data from a large database we can use the LIMIT clause to limit the data amount returned by the statement. sqlite> SELECT region_name AS Name of the Region FROM regions Here in the following example, the customize heading contain more than one words and it used without quote unquote, and this statement occurs an error. SELECT region_name AS "Name of the Region" FROM regions If the customize heading contain more than one words then it will be within a quote unquote unless it can be used independently. If you want to retrieve the region_name column from the regions table with the customize column head "Name of the Region" the following SQL can be used. It can be done by using the AS clause followed the column name or any expression with the select statement. So the return value for that column will appear in short from, and sometimes we required to display it in full name. Sometimes we use the column name as short form against a keyword for that column. ![]() ![]() Here in the above, the two SELECT statements are identical, the latter uses a table alias z for regions. Sqlite> SELECT z.region_name FROM regions z sqlite> SELECT regions.region_name FROM regions The tables using followed by the FROM clause have an optional alias name that can be used to mention individual column names in the result.Where the table name in full can be used to qualify columns of a table, the aliases are not used. In the FROM list with a select statement, one or more table names can be included separated by a comma. Magdalen Centre, The Oxford Science Park Oxford sqlite> SELECT street_address, city FROM locations ![]() SELECT street_address, city FROM locations If you want to retrieve the columns street_address and city from the location table the following SQL can be used. The SELECT statement can be used to retrieve specific columns. Here in the above example the * have been used to indicate ALL the records from the locations table.Īn expression can only be executed: sqlite> SELECT 6+15 Location_id street_address postal_code city state_province country_idġ200 2017 Shinjuku- 1689 Tokyo Tokyo Prefectu JPġ400 2014 Jabberwoc 26192 Southlake Texas USġ500 2011 Interiors 99236 South San California USġ600 2007 Zagora St 50090 South Brun New Jersey USġ700 2004 Charade R 98199 Seattle Washington USġ800 147 Spadina Av M5V 2L7 Toronto Ontario CAġ900 6092 Boxwood S YSW 9T2 Whitehorse Yukon CAĢ100 1298 Vileparle 490231 Bombay Maharashtra INĢ200 12-98 Victoria 2901 Sydney New South Wale AUĢ500 Magdalen Centr OX9 9ZB Oxford Oxford UKĢ600 9702 Chester R 9629850293 Stretford Manchester UKĢ700 Schwanthalerst 80925 Munich Bavaria DEĢ800 Rua Frei Canec 01307-002 Sao Paulo Sao Paulo BRĢ900 20 Rue des Cor 1730 Geneva Geneve CHģ100 Pieter Breughe 3029SK Utrecht Utrecht NLģ200 Mariano Escobe 11932 Mexico Cit Distrito Feder MX If you want to retrieve all the rows from the locations table the following SQL can be used.
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