MySQL Query To Retrieve Data With Column Names
Solution 1
Your columns are part of the metadate of the DataReader or DataTable that you load in c#
From MSDN for DataTable:
private void PrintColumnNames(DataSet dataSet)
{
// For each DataTable, print the ColumnName.
foreach(DataTable table in dataSet.Tables)
{
foreach(DataColumn column in table.Columns)
{
Console.WriteLine(column.ColumnName);
}
}
}
For a DataReader, see Can you get the column names from a SqlDataReader?
Solution 2
I resolved my issue using following code.
var QueryCommand = new MySqlCommand(txtQuery.Text, Connection);
var ResultReader = QueryCommand.ExecuteReader();
for (var f = 0; f < ResultReader.FieldCount; f++)
{
ResultGrid.Columns.Add("column" + f, ResultReader.GetName(f));
}
Solution 3
you can use SHOW COLUMNS
mysql> SHOW COLUMNS FROM City;
+------------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+----------+------+-----+---------+----------------+
| Id | int(11) | NO | PRI | NULL | auto_increment |
| Name | char(35) | NO | | | |
| Country | char(3) | NO | UNI | | |
| District | char(20) | YES | MUL | | |
| Population | int(11) | NO | | 0 | |
+------------+----------+------+-----+---------+----------------+
See: http://dev.mysql.com/doc/refman/5.0/en/show-columns.html
But INFORMATION_SCHEMA is the ANSI means of determining columns, tables, constraints, etc. INFORMATION_SCHEMA.COLUMNS is equivalent to SHOW COLUMNS
:
SELECT COLUMN_NAME, DATA_TYPE, IS_NULLABLE, COLUMN_DEFAULT
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'tbl_name'
[AND table_schema = 'db_name']
[AND column_name LIKE 'wild']
Solution 4
You need a programing language to do same as phpMyAdmin. You can use mysql_fetch_assoc()
It will return a row of data in which each of the elements will have for key the name of the column:
PHP solution
array(
[0] => array(
[id] => 1,
[name] => 'Test name'
),
[1] => array(
[id] => 2,
[name] => 'Name 2'
)
)
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Umair A.
Updated on June 07, 2022Comments
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Umair A. almost 2 years
I am writing some tool which has to retrieve column names of the retrieved data set when any query is applied to it.
If you're familiar with phpMyAdmin, you would realize the SQL pane does what is it runs your query and shows result with the column names. I wonder how hard the query would be, it always results in column names and what's actually the programming behind the scene? Is it like, it analyzes the query and then find table names from it and then first retrieve column names using query
show columns from table-name
and then the data?Is there any better way?
UPDATED Sorry for incomplete information, I think I must say I am using MySQL connector for .NET and am using C#.
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Umair A. almost 13 yearsThe need is to get them with data itself.
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Alex Rashkov almost 13 yearsYou hadn't specified any language in your question.
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Umair A. almost 13 yearsYou solution is no doubt helpful from PHP perspective as I didn't realize this either.
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ZygD almost 13 yearsWhich is similar to my answer which is for c#. Is there a ResultReader in c# natively?
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Umair A. almost 11 yearsI will mark your solution as answer because you got more votes than my own solution :)