Suppose I have a table of customers and a table of purchases. Each purchase belongs to one customer. I want to get a list of all customers along with their last purchase in one SELECT statement. What is the best practice? Any advice on building indexes? Please use these table/column names in your answer: customer: … Read more
I’m trying to use a select statement to get all of the columns from a certain MySQL table except one. Is there a simple way to do this? EDIT: There are 53 columns in this table (NOT MY DESIGN) 33 Answers 33 Actually there is a way, you need to have permissions of course for … Read more
SELECT DISTINCT field1, field2, field3, …… FROM table I am trying to accomplish the following sql statement but I want it to return all columns is this possible? Something like: SELECT DISTINCT field1, * from table 18 Answers 18
I would like to know the following: how to get data from multiple tables in my database? what types of methods are there to do this? what are joins and unions and how are they different from one another? When should I use each one compared to the others? I am planning to use this … Read more
I have a stored procedure that returns 80 columns, and 300 rows. I want to write a select that gets 2 of those columns. Something like SELECT col1, col2 FROM EXEC MyStoredProc ‘param1’, ‘param2’ When I used the above syntax I get the error: “Invalid Column Name”. I know the easiest solution would be to … Read more
Is it possible to create a temporary (session only) table from a select statement without using a create table statement and specifying each column type? I know derived tables are capable of this, but those are super-temporary (statement-only) and I want to re-use. It would save time if I did not have to write up … Read more
How to check if page id(SomeID) is actually published? 3 s 3 You can use ‘publish’ === get_post_status( $id ), where $id could be the current page ID retrieved via get_the_ID() or any other.
I have part search function in my WordPress website which uses dynamic dependent select box. However, now I have the following problem: If only select the first one box, or select the first two boxes, and click the Search button, it successfully jumps to the result page. However, if continuously select the third box, it … Read more
How do I make the first option of selected with jQuery? <select id=”target”> <option value=”1″>…</option> <option value=”2″>…</option> </select> 28 s 28 $(“#target”).val($(“#target option:first”).val());
I need to check (from the same table) if there is an association between two events based on date-time. One set of data will contain the ending date-time of certain events and the other set of data will contain the starting date-time for other events. If the first event completes before the second event then … Read more
