I want to store condition in database.
Each row of a certain table contains a specific condition involving its columns
Ex,.
table_name
value_x
value_y
condition
result
Then for querying
$condition = TableName::find($id)->condtion;
$resultSet = TableName::whereRaw($condition)->get();
I know this code is silly, but i hope you get the point.
Related
I have 2 tables with the same columns except the second table have one more column, this column is foreign key of the first;
what i want is to make union query;but for union the column must the same; so i want to select all column except for the column distinct;
The easy way is to provide in select all the same column:
$a = Table1::select(['column1', 'column2', 'etc...']);
$b = Table2::select(['column1', 'column2', 'etc...']);
and go with $a->union($b)->get();
but if i have too much column, i end up with so much column to provide in the select function; so what i want is to provide in the query the column that i don't want to retrieve;
i can put protected $hidden in the second table model but for some reason i need this distinct column on some other query;
Get all columns name by Schema::getColumnListing($table);
And computes the intersection of arrays
array_intersect($columnsName1, $columnsName2);
I haven't done it with 2 tables but I am using collections and rejecting certain columns on a similar project:-
$row = Table1::firstOrFail();
$exclude=['column_1', 'column_2'];
return collect(array_keys($row->getAttributes()))
->reject(function ($name) use ($row, $exclude) {
return in_array($name, $row->getHidden())
|| in_array($name, $exclude);
}
);
I have two tables
table1
id|name|next_field
table2
id|id_of_table1|whatelse
I do a msql query to get all entries of table1 and the number of entries in table2 who has table2.id_of_table1 = table1.id
This is my query - it works fine.
$select =array('table1.*', 'COUNT(table2.id) AS `my_count_result`',);
$this->db->select($select);
if($id!=false){ $this->db->where('id',$id); }
$this->db->from('table1 as t1');
$this->db->join('table2 as t2', 't1.id = t2.id_of_table1');
return $this->db->get()->result_array();
Now I have another field which has coma-separated data
table1.next_field = info1, info2, next,...
Now I want to check in the same way like the first query how often for example "info2" is as a part inside the table1.next_field
Is it possible, how?
After all i decide to change my database structure to make the work and handle much easier.
I need to update a column in one table with the results from a select sub-query (and they should ultimately be different). But When I do this, I get the 'ORA-01427: single row sub-query returns more than one row query' error.
Can you please take a look and see what it is that I am overlooking? (I could just be overlooking something simple for all I know)
UPDATE AIRMODEL_NETWORK_SUMMARY ans
SET ANS.NBR_RETURNS = (
SELECT SUM(RQ.RETURN_QTY)
FROM RETURN_QTY RQ JOIN AIRMODEL_NETWORK_SUMMARY ANS ON RQ.LOC_ID = ANS.LOC_ID
WHERE RQ.FSCL_YR_NUM = ans.FSCL_YR_NUM
AND RQ.FSCL_WK_IN_YR_NUM =
ans.FSCL_WK_IN_YR_NUM
GROUP BY ANS.LOC_ID,
ans.FSCL_WK_IN_YR_NUM,
ANS.FSCL_YR_NUM
);
I think that your inner query is not well correlated to the table that you're trying to update. Please look here Oracle SQL: Update a table with data from another table. You should add some kind of a where condition that ties the rows you're trying to update with the values calculated by the inner statement.
I have created a view in oracle. Now i would like to fetch data from that view. So i have written a SQL Query. But the query is not working for not having a specific condition. But if I give that condition the query executes. But the problem is not occurring if i joined the same number of tables (that were used to create view) instead of using view. In the following I am giving the oracle query.
SELECT *
FROM "920_search_report"
WHERE lm_culture = '7aacb509-271d-4aca-e040-e00adea40aae'
AND hand_person_info_guid = 'eebd4257-7856-4c6e-b6b8-9b886e89e397'
AND ( Lower(handicap_type) LIKE Lower('%DQ871J%')
OR Lower(skskodenr) LIKE Lower('%DQ871J%') );
The above query executes and returns one record but if I omit or comment the third line then the query does not return any records, but it should return one or two. the query is given below:
SELECT *
FROM "920_search_report"
WHERE lm_culture = '7aacb509-271d-4aca-e040-e00adea40aae'
--AND HAND_PERSON_INFO_GUID='eebd4257-7856-4c6e-b6b8-9b886e89e397'
AND ( Lower(handicap_type) LIKE Lower('%DQ871J%')
OR Lower(skskodenr) LIKE Lower('%DQ871J%') );
Can anyone help me to solve the problem.
I am trying to refer to a column name to order a query in an application communicating with an Oracle database. I want to use a bind variable so that I can dynamically change what to order the query by.
The problem that I am having is that the database seems to be ignoring the order by column.
Does anyone know if there is a particular way to refer to a database column via a bind variable or if it is even possible?
e.g my query is
SELECT * FROM PERSON ORDER BY :1
(where :1 will be bound to PERSON.NAME)
The query is not returning results in alphabetical order, I am worried that the database is interpreting this as:-
SELECT * FROM PERSON ORDER BY 'PERSON.NAME'
which will obviously not work.
Any suggestions are much appreciated.
No. You cannot use bind variables for table or column names.
This information is needed to create the execution plan. Without knowing what you want to order by, it would be impossible to figure out what index to use, for example.
Instead of bind variables, you have to directly interpolate the column name into the SQL statement when your program creates it. Assuming that you take precautions against SQL injection, there is no downside to that.
Update: If you really wanted to jump through hoops, you could probably do something like
order by decode(?, 'colA', colA, 'colB', colB)
but that is just silly. And slow. Don't.
As you are using JDBC. You can rewrite your code, to something without bind variables. This way you can also dynamically change the order-by e.g.:
String query = "SELECT * FROM PERS ";
if (condition1){
query = query+ " order by name ";
// insert more if/else or case statements
} else {
query = query+ " order by other_column ";
}
Statement select = conn.createStatement();
ResultSet result = select.executeQuery(query);
Or even:
String columnName = getColumnName(input);
Statement select = conn.createStatement();
ResultSet result = select.executeQuery("SELECT * FROM PERS ORDER BY "+columnName);
ResultSet result = select.executeQuery(
"SELECT * FROM PERS ORDER BY " + columnName
);
will always be a new statement to the database.
That means it is, like Thilo already explained, impossible to "reorder" an already bound, calculated, prepared, parsed statement. When using this result set over and over in your application and the only thing, which changes over time is the order of the presentation, try to order the set in your client code.
Otherwise, dynamic SQL is fine, but comes with a huge footprint.