SQL joining tables issue

SQL joining tables issue

By : user2951334
Date : November 18 2020, 01:01 AM
hope this fix your issue your query looks very strange for me, try this version with proper order:
code :

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Joining two tables Issue

Joining two tables Issue

By : bedir
Date : March 29 2020, 07:55 AM
may help you . If you don't want a column repeated, you can't use SELECT * FROM but rather you will need to use the column names you want to select.
You aren't getting the 4000 result you are expecting because you are doing an inner join on a field that doesn't exist in the other table. (Azeem = 4000, but no note_contact exists for user 4000).
code :
    contacts a
        left outer join notes b
            on a.contact_id=b.note_contact
    a.contact_text like '%azeem%'
    or b.note_text like '%azeem%'
mysql> CREATE TABLE `contacts` (
    ->   `contact_id` int(4) DEFAULT NULL,
    ->   `contact_text` varchar(40) DEFAULT NULL,
    ->   `contact_email` varchar(40) DEFAULT NULL
    -> ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE `notes` (
    ->   `note_id` int(3) NOT NULL AUTO_INCREMENT,
    ->   `note_contact` int(4) DEFAULT NULL,
    ->   `note_text` tinytext,
    ->   PRIMARY KEY (`note_id`)
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO `contacts` (`contact_id`, `contact_text`, `contact_email`) VALUES
    -> (4000, 'azeem', 'azeem@big.com'),
    -> (4001, 'nawaz', 'azeem@big.com'),
    -> (4002, 'nawaz', 'azeem@big.com');
Query OK, 3 rows affected (0.00 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> INSERT INTO `notes` (`note_id`, `note_contact`, `note_text`) VALUES
    -> (1, 4001, 'I am text1'),
    -> (2, 4001, 'I am text2'),
    -> (3, 4001, 'my name is azeem'),
    -> (4, 4001, 'come here'),
    -> (5, 4001, 'I don''t want to'),
    -> (6, 4003, 'My text is clear.');
Query OK, 6 rows affected (0.01 sec)
Records: 6  Duplicates: 0  Warnings: 0
mysql> select
    -> b.note_id,
    -> b.note_contact,
    -> a.contact_text,
    -> b.note_text
    -> from
    -> contacts a
    -> left outer join notes b
    -> on a.contact_id=b.note_contact
    -> where
    -> a.contact_text like '%azeem%'
    -> or b.note_text like '%azeem%';
| note_id | note_contact | contact_text | note_text        |
|    NULL |         NULL | azeem        | NULL             |
|       3 |         4001 | nawaz        | my name is azeem |
2 rows in set (0.00 sec)
$where_clause = " where contacts.contact_text like '%".addslashes($_GET['s'])."%' or notes.note_text like '%".addslashes($_GET['s'])."%'";
$result = mysql_query("select distinct contacts.contact_id from contacts left outer join notes on contacts.contact_id=notes.note_contact $where_clause")
Issue in joining 4 tables

Issue in joining 4 tables

By : John Gravel
Date : March 29 2020, 07:55 AM
hop of those help? INNER JOINs will only show rows where all tables provide non-null values. Since your schema contains optional providers, you will need to use some kind of outer join instead (e.g. LEFT JOIN):
code :
SELECT Client_Portfolio.*,
Client.Name as "Client Name",
Provider.Name as "Provider Name",
FROM Client_Portfolio
INNER JOIN Client ON Client_Portfolio.idClient = Client.idClient
INNER JOIN Portfolio ON Client_Portfolio.idPortfolio = Portfolio.idPortfolio
-- show row even if it does not have a provider:
LEFT JOIN Provider ON Portfolio.idProvider = Provider.idProvider
Issue while joining many tables

Issue while joining many tables

By : To Alex
Date : March 29 2020, 07:55 AM
hope this fix your issue Associations between menu_details and pizza_menu were made wrong so I chaged menu_details to :
code :
| id | order_details_fk | pizza_menus_fk | products_fk |
| 17 |        132       |       25       |     39      |
| 18 |        132       |       26       |     40      |
| 19 |        132       |       27       |     41      |
| 20 |        132       |       28       |     42      |
SELECT   DISTINCT products.product_name, sizes.pizza_size_name 
FROM     products, menu_details, pizza_menus, sizes 
WHERE    products.product_id = menu_details.products_fk 
AND      menu_details.pizza_menus_fk = pizza_menus.id 
AND      pizza_menus.size_id = sizes.pizza_size_id 
AND      menu_details.order_details_fk = 132
SQL: issue joining tables

SQL: issue joining tables

By : Benny Haer
Date : March 29 2020, 07:55 AM
will be helpful for those in need You might need to do inner join by two columns attr_value_id and attr_id. Try this query:
code :
SELECT     dbo.select_attributevalue.attr_value, dbo.select_attributevalueassign.itm_id
FROM         dbo.select_attributevalueassign 
    INNER JOIN dbo.select_attributevalue ON 
    dbo.select_attributevalueassign.attr_id = dbo.select_attributevalue.attr_id
    AND dbo.select_attributevalueassign.attr_value_id = dbo.select_attributevalue.attr_value_id
WHERE     (dbo.select_attributevalueassign.itm_id = 396)
Issue in joining two tables

Issue in joining two tables

By : Jason Mooneyham
Date : March 29 2020, 07:55 AM
I wish did fix the issue. In MySQL, character is a reserved word, although it is not a reserved word in other databases. The list of MySQL reserved words is here. You use backticks to escape values in MySQL.
You should also use proper, explicit join syntax:
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