I'm having a json format stored in the database like this
{"fooKey": "fooValue", "barKey": "barValue"}
I'm trying to run an UPDATE query using JSON_SET in order to add some additional stuff, so
UPDATE `table`
SET `dbcol` = JSON_SET(`dbcol`, '$.newitem', 'newvalue')
WHERE `id` = 12;
The problem is I want to add some nested elements so my final result should look like this
{"fooKey":"fooValue","barKey":"barValue", "newItem":"newValue", "anotherNewItem":{"subItemKey":"subItemValue", "anotherSubItemKey":"anotherSubItemValue"}}
How can I do this?
For the specific example you have given, you can nest two JSON_SET calls, and use JSON_OBJECT to create the data to be inserted for key anothernewitem:
UPDATE table
SET dbcol = JSON_SET(JSON_SET(dbcol, '$.newitem', 'newvalue'),
'$.anothernewitem',
JSON_OBJECT('subitemkey', 'subitemvalue', 'anothersubitemkey', 'anothersubitemvalue'))
WHERE id = 12;
Demo on dbfiddle
Related
I'm trying to get values from my linking table sfees with columns student_id and mfee_id. Here, there might be multiple student_id with different mfee_id. The thing is that, i want to retrieve all mfee_id with same student_id.
I have used following syntax, but it is only returning single value:
public function verify($id,$sid)
{
$sfees = sfee::where('student_id', $sid)->value('mfee_id');//trying to get only mfee_id
return $sfees;
}
How can i solve this problem?
//edited
My table looks like:
You need to do a groupBy -
$sfees = sfee::where('student_id', '=',$sid)->groupBy('student_id')->get();
UPDATE
Try something like this -
$sfees = sfee::where('student_id', '=',$sid)->lists('mfee_id');
Or you can use the Schema Builder like this -
DB::table('sfees')->where('student_id', '=', $id)->lists('mfee_id');
I want to use where condition on a json object in a table, in postgreSql. how i need to do this for example: i have a table 'test' it has three columns name(varchar),url(varchar),more(json). i need to retrive date where css21Colors = Purple.
more is a json type and below is the values of more field.
Please let me know what should be syntax of querying for the same?
more = {"colorTree":{"Purple":[{"Spanish Violet":"#522173"}],
"Brown":[{"Dark Puce":"#4e3347"}],"White":[{"White":"#ffffff"}],
"Black":[{"Eerie Black":"#1d0d27"}],"Gray":[{"Rose Quartz":"#a091a4"}]},
"sizeoutscount":0,"css21Colors":{"Purple":69,"Brown":5,"White":4,"Black":17,"Gray":3},
"sizeins": [],"sizeinscount":0,"sizeouts":[],"allsizes":["8","10","16"],
"css3Colors": {"Rose Quartz":3,"White":4,"Dark Puce":5,"Eerie Black":17,"Spanish
Violet":69},"hexColors":{"#522173":69,"#4e3347":5,"#ffffff":4,"#1d0d27":17,"#a091a4":3}}
SELECT more->'css21Colors'->'Purple' FROM test;
Additionally you can query only the rows containing that key.
SELECT
more->'css21Colors'->'Purple'
FROM
test
WHERE
(more->'css21Colors')::jsonb ? 'Purple';
Mind switching to the jsonb data type.
I have this form in C# with a listbox where I selected 4 items. Now I want to make single stored procedure using which I can find data from single table for all this selected item with single parameter.
As I am a beginner when it comes to SQL Server, I completely don't know this type of procedure
Thanks, but this is not my question's answer
I want a Single Stored Procedure for all Items which are selected in ListBox
Create Procedure procedureName
(
#ItemName varchar(50),
)
AS
BEGIN
(
Select * from item_master where item_name = #ItemName
)
END
by this Query i can find data for one ItemName, but i want for all selected Items in Listbox, even I don't know the C# code also,
so plz help me....
This is a very simple example that does what you want. You would not want to use hard-coded connection strings, especially in-line, and you would want error-handling, but I am going for as much clarity as possible. You would also probably want to make the column length greater than 50 characters, but I made it match your column definition.
Also, I would recommend a generic approach, passing keys (column names) and values, so as to be able to use it for any sort of criteria, but you asked that I keep it to exactly what you require, so I trimmed it down to the essential.
This example returns all the Employees with FirstName matching any in the list passed to the stored procedure (as a user-defined table type).
First, create a user-defined table type (to hold the values you want to pass to the stored procedure) in your SQL Server database as follows:
CREATE TYPE [dbo].[FilterValues] AS TABLE(
[Value] [varchar](50) NOT NULL,
PRIMARY KEY CLUSTERED
(
[Value] ASC
)
)
The stored procedure to return the Employees looks as follows (note that it has the user-defined table type as the type of the single parameter passed in):
CREATE PROCEDURE [dbo].[GetEmployees] (
#FirstNameFilterValues dbo.FilterValues READONLY
)
AS
BEGIN
SELECT * FROM Employees
INNER JOIN #FirstNameFilterValues fv ON fv.Value = Employees.FirstName;
END
That's the SQL Server side done. To call it from C#, you can create a DataTable with a single column matching the column name and populate it with the values you want. In this simple example, I populate it with two names, but it could be as many as you want.
var filterValuesDataTable = new DataTable();
filterValuesDataTable.Columns.Add(new DataColumn("Value", typeof(string)) { AllowDBNull = false });
filterValuesDataTable.Rows.Add("Frodo");
filterValuesDataTable.Rows.Add("Sam");
using (var connection = new SqlConnection("server=.;Initial Catalog=Test;Integrated Security=True;"))
{
connection.Open();
using (var command = connection.CreateCommand())
{
command.CommandText = "GetEmployees";
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue("#FirstNameFilterValues", filterValuesDataTable);
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
Console.WriteLine("{0} {1}", reader["FirstName"], reader["LastName"]);
}
reader.Close();
}
}
connection.Close();
}
My table has a column with a JSON string that has nested objects (so a simple REPLACE function cannot solve this problem) . For example like this: {'name':'bob', 'blob': {'foo':'bar'}, 'age': 12}. What is the easiest query to append a value to the end of the JSON string? So for the example, I want the end result to look like this: {'name':'bob', 'blob': {'foo':'bar'}, 'age': 12, 'gender': 'male'} The solution should be generic enough to work for any JSON values.
What about this
UPDATE table SET table_field1 = CONCAT(table_field1,' This will be added.');
EDIT:
I personally would have done the manipulation with a language like PHP before inserting it. Much easier. Anyway, Ok is this what you want? This should work providing your json format that is being added is in the format {'key':'value'}
UPDATE table
SET col = CONCAT_WS(",", SUBSTRING(col, 1, CHAR_LENGTH(col) - 1),SUBSTRING('newjson', 2));
I think you can use REPLACE function to achieve this
UPDATE table
SET column = REPLACE(column, '{\'name\':\'bob\', \'blob\': {\'foo\':\'bar\'}, \'age\': 12}', '{\'name\':\'bob\', \'blob\': {\'foo\':\'bar\'}, \'age\': 12, \'gender\': \'male\'}')
Take care to properly escape all quotes inside json
Upon you request of nested json, i think you can just remove last character of the string with SUBSTRING function and then append whatever you need with CONCAT
UPDATE table
SET column = CONCAT(SUBSTRING(column, 0, -1), 'newjsontoappend')
modify Jack's answer. Works perfectly even column value is empty on first update.
update table
set column_name = case when column_name is null or column_name =''
then "{'foo':'bar'}"
else CONCAT_WS(",", SUBSTRING(column_name, 1, CHAR_LENGTH(column_name) - 1),SUBSTRING("{'foo':'bar'}", 2))
end
My database (mysql) tables use TIMESTAMP columns, and whenever I want them returned in a query, I want them to be queried as "UNIX_TIMESTAMP(columnname)".
How do you easily modify queries in zend framework to achieve this?
For example, the current code is:
select = $this->select();
$select->where('user_id = ?',$user_id);
return $this->fetchAll($select);
This eventually becomes:
select * from tablename where user_id = 42;
I want something that automatically finds the TIMESTAMP column and changes the resulting query to:
select user_id,name,unix_timestamp(created) where user_id = 42;
I know I can use a MySQL view to achieve this, but I'd rather avoid that.
Thanks.
RR
You should be able to specify the fields you want in the select using the $select->from() object.
Zend_Db_Select
You should end up with something like this.
$select = $this->select();
$select->from(
array('t' => 'tablename'),
array('user_id', 'name', 'UNIX_TIMESTAMP(created)')
);
$select->where('user_id = ?',$user_id);
return $this->fetchAll($select);
If you wanted to run an expression that doesn't have parenthese in the function, Use the Zend_Db_Expr() method to escape the query properly.