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Diffstat (limited to 'user_guide_src/source/database/queries.rst')
| -rw-r--r-- | user_guide_src/source/database/queries.rst | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/user_guide_src/source/database/queries.rst b/user_guide_src/source/database/queries.rst index 90f49afb1..43a0a30bf 100644 --- a/user_guide_src/source/database/queries.rst +++ b/user_guide_src/source/database/queries.rst @@ -2,10 +2,14 @@ Queries ####### -$this->db->query(); -=================== +************ +Query Basics +************ -To submit a query, use the following function:: +Regular Queries +=============== + +To submit a query, use the **query** function:: $this->db->query('YOUR QUERY HERE'); @@ -18,10 +22,11 @@ this:: $query = $this->db->query('YOUR QUERY HERE'); -$this->db->simple_query(); -========================== +Simplified Queries +================== -This is a simplified version of the $this->db->query() method. It DOES +The **simple_query** method is a simplified version of the +$this->db->query() method. It DOES NOT return a database result set, nor does it set the query timer, or compile bind data, or store your query for debugging. It simply lets you submit a query. Most users will rarely use this function. @@ -116,7 +121,9 @@ this: :: - $search = '20% raise'; $sql = "SELECT id FROM table WHERE column LIKE '%".$this->db->escape_like_str($search)."%'"; + $search = '20% raise'; + $sql = "SELECT id FROM table WHERE column LIKE '%" . + $this->db->escape_like_str($search)."%'"; ************** @@ -132,6 +139,15 @@ put the queries together for you. Consider the following example:: The question marks in the query are automatically replaced with the values in the array in the second parameter of the query function. +Binding also work with arrays, which will be transformed to IN sets:: + + $sql = "SELECT * FROM some_table WHERE id IN ? AND status = ? AND author = ?"; + $this->db->query($sql, array(array(3, 6), 'live', 'Rick')); + +The resulting query will be:: + + SELECT * FROM some_table WHERE id IN (3,6) AND status = 'live' AND author = 'Rick' + The secondary benefit of using binds is that the values are automatically escaped, producing safer queries. You don't have to remember to manually escape data; the engine does it automatically for @@ -141,8 +157,7 @@ you. Handling Errors *************** -$this->db->error(); -=================== +**$this->db->error();** If you need to get the last error that has occured, the error() method will return an array containing its code and message. Here's a quick |