![]() We see the data is in ascending order in all the columns. We’ll use “ employee” table as shown on the top of this tutorial. Let’s take examples of how ORDER BY can be used to sort the output. What if you want the output by sorting the data, for example, by descending order, ascending order or sorted according to a particular column? In that case, ORDER BY clause is used. $r=mysql_query('select * from employee where name like "%m"') Įcho "employee_id:".$ro."" Here, “ like” keyword searches the data in the table for the name that ends with the letter “ m” and displays the output as follows: The syntax is: Select * from table_name where your_data like your_condition Įxample, Select * from employee where name like “%m” ![]() Now we’ll see how “ like” is used for querying. Use of “ where” with “ update” have been described in Updating Table. If($q=mysql_query('delete from employee where employee_id="11"')) The syntax for using where with delete is: Delete from table_name where your_condition Įxample, Delete from employee where employee_id=”11” Let’s try some more examples but this time we’ll use delete command. Similarly, you can try for the column name as “ salary” and “ employee_id” also. Suppose you want to see the result only for the name “ ravi” from the table “ employee”, then it can be done as follows: Select * from employee where name=”ravi” The basic syntax for all queries with the use of where is: Select * from table_name where your_condition Let’s see this with an example of “ employee” table that contains the following data as described in the Updating Table: Suppose you want a particular result from the table, you can specify that in your query using the word “ where”. In this tutorial, you will learn how to select a particular data from the table using WHERE, LIKE and ORDER BY keywords. (I'm sorry for coming back to this after several weeks have elapsed, but I was diverted onto some other projects in the interim, and have just got back to this.In the previous MySQL tutorial on Deleting Table, you learnt how an unwanted table can be deleted from database. Have I applied your suggestion incorrectly, or have I missed something else the is essential? (There are no Javascript error reported.) The sort order is not as defined above, but is alphabetical, as it was before I inserted the code above. I have included the plug-in in the HTML: I have the following code to define the enum for the sort-order: $.extend( $.fn.dataTable.enum( Where column 4 is the column I want to sort via the enum. ![]() I have the following in my DataTable: columnDefs: [ I've tried to implement the enum solution as you suggested, but I've got something wrong that I can't figure out. That is the type of sort I wanted to achieve when I asked my question. I thought I might include this example from another application (that does not use DataTables) here to illustrate what I had in mind originally: order by field(status, Then I can just sort that column (provided I can sort on a hidden column) because I would not want to display that.Īlso, related to Kevin's suggestion, the example of the order by field that I had in mind is simpler that what Kevin emulated. Now, looking at what Kevin's plugin does, I realized that I can make this issue go away by looking up the sort order for the content of this field (it has only a half-dozen possible values, from a select element) and storing that as another field in the database when I store the record. ![]() Or, do I just need to replace custom with enum in this case? I had seen the use of custom in the documentation, but I did not find anything that defined the type custom, so I thought I needed to find a way to define it.
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