Collections:
Select Rows with WHERE Clause in MySQL
How To Select Some Rows from a Table in MySQL?
✍: FYIcenter.com
If you don't want select all rows from a table, you can specify a WHERE clause to tell the query to return only the rows that meets the condition defined in the WHERE clause. The WHERE clause condition is a normal Boolean expression. If any data from table needs to be used in the Boolean expression, column names should be used to represent the table data.
The first select statement below only returns rows that have url names containing the letter "a". The second select statement returns no rows, because the WHERE clause results FALSE for all rows in the table.
mysql> SELECT * FROM fyi_links WHERE url LIKE '%a%'; +-----+-------------------+-------+--------+--------------- | id | url | notes | counts | created +-----+-------------------+-------+--------+--------------- | 102 | dba.fyicenter.com | NULL | 0 | 2006-07-01 12: | 103 | sqa.fyicenter.com | NULL | NULL | 2006-07-01 12: +-----+-------------------+-------+--------+--------------- 2 rows in set (0.00 sec) mysql> SELECT * FROM fyi_links WHERE FALSE; Empty set (0.00 sec)
⇒ Adding More Data to the Test Table in MySQL
⇐ Selecting Columns in a Query in MySQL
2017-11-02, 1373🔥, 0💬
Popular Posts:
How To Create a Dynamic Cursor with the DYNAMIC Option in SQL Server Transact-SQL? If the underlying...
How To Use DATEADD() Function in SQL Server Transact-SQL? DATEADD() is a very useful function for ma...
What Is an Oracle Tablespace in Oracle? An Oracle tablespace is a big unit of logical storage in an ...
How To Use GO Command in "sqlcmd" in SQL Server? "sqlcmd" is a command line client application to ru...
How To Install PHP on Windows in MySQL? The best way to download and install PHP on Windows systems ...