How to do a Select in a Select - Stack Overflow
Apr 17, 2009 · I have a table containing a unique ID field. Another field (REF) contains a reference to another dataset's ID field. Now I have to select all datasets where REF points to a …
Is there an onSelect event or equivalent for HTML <select>?
Another option could be to use onblur on the select. This will fire anytime the user clicks away from the select. At this point you could determine what option was selected. To have this even …
What does it mean `SELECT 1 FROM table`? - Stack Overflow
Jun 13, 2024 · select 1 from table will return the constant 1 for every row of the table. It's useful when you want to cheaply determine if record matches your where clause and/or join.
sql server - SQL select from a select query - Stack Overflow
Mar 6, 2019 · I want to do a select request that perform a first select and then use that selection to perform a second select. I made a 1st version using a temp table but I would like to know if …
sql server - Select with (nolock) - Stack Overflow
May 5, 2014 · SELECT statements do indeed apply locks unless there is a statement at the top of the query SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED. By all means use …
sql - How to rename columns with `SELECT`? - Stack Overflow
Mar 5, 2009 · I have two tables with one identical column name, but different data. I want to join the tables, but access both columns (row["price"], row["other_price"]): How can I rename/alias …
sql - Case in Select Statement - Stack Overflow
Jan 7, 2013 · Using a SELECT statement with a searched CASE expression Within a SELECT statement, the searched CASE expression allows for values to be replaced in the result set …
mysql - SELECT * WHERE NOT EXISTS - Stack Overflow
SELECT * from employees WHERE NOT EXISTS ( SELECT name FROM eotm_dyn WHERE eotm_dyn.employeeid = employees.employeeid ) assuming that the two tables are linked by a …
How to select unique records by SQL - Stack Overflow
When I perform SELECT * FROM table I got results like below: 1 item1 data1 2 item1 data2 3 item2 data3 4 item3 data4 As you can see, there are dup records from column2 (item1 are …
How can I set the default value for an HTML <select> element?
Aug 19, 2010 · Learn how to set the default value for an HTML <select> element using JavaScript or HTML techniques.