sql - Extracting Unknown Dates -


i have 2 tables, employees , job_history. 2 tables have 3 columns identical: employee_id, job_id, , department_id.

i need display last_name , department_id employees table, date when each employee hits 20 year work anniversary.

the date when employees start work located in start_date job_history table. anniversary date needs displayed format: january twenty-third, nineteen eighty-two.

    select e.last_name, e.department_id, count(*) "20 year anniversary"     job_history l     inner join employees e on e.department_id = l.department_id     group e.department_id, e.last_name     having count(*) = l.start_date + 20;

now when run it, tells me isn't group function. how change proper syntax?

not sure why counting anything, never mind comparing count date. adding 20 date adds twenty days.

this might closer want:

select e.last_name, e.department_id,   add_months(min(jh.start_date), 240) "20 year anniversary" employees e inner join job_history jh on jh.employee_id = e.employee_id group e.employee_id, e.last_name, e.department_id;

the join between tables on emoloyee_id, because want earliest start date of job in department (presumably).

once have earliest date can add 20 years, 240 months.

you can read how format date string in documentation.


Comments

Post a Comment

Popular posts from this blog

sql server - Cannot query correctly (MSSQL - PHP - JSON) -

i have little problem on project. , turns out query result returns nothing when value of first name or last name has 'ñ' in it. here's code config.php: <?php ini_set('mssql.charset', 'utf-8'); header('content-type: text/html; charset=utf-8'); $servername = "192.168.1.21"; /* ip add of db server */ $connection = array("database" => "db", "uid" => "?", "pwd" => "***"); $conn = sqlsrv_connect($servername, $connection); if(!$conn){ echo "connection not established."; die(print_r(sqlsrv_errors(), true)); } ?> myquery: $idnumber = $_post["idnum"]; $response = array(); $query2 = "select clname, cfname, cmname, cqualifier student cidno = '$idnumber'"; try{ $stmt2 = sqlsrv_query($conn, $query2); } catch(pdoexeption $ex){ $response["success"] = 0; $response["message"] = "d...
Read more

php - trouble displaying mysqli database results in correct order -

i have table in database stores events , date expire. want display events on website display current events first expired events after? i have tried following sql $sql = "select noticeid, notice, noticedesc, noticeimg, noticedate, expirydate tbl_notices group noticeid ,expired order expirydate asc"; but returns expired results first due expirydate being ordered asc in query. my tbl_notice structure looks this noticeid => int(4) notice => varchar(100) noticedesc => text noticedate => timestamp noticeimg => varchar(40) expirydate => datetime expired => int(1) 0 current or 1 expired my php code is $sql = "select noticeid, notice, noticedesc, noticeimg, noticedate, expirydate tbl_notices group noticeid ,expired order expirydate asc"; $result = mysqli_query($conn,$sql); if ($result->num_rows > 0) { // output data of each row while($row = $result->fetch_assoc()) { ...
Read more

C++ Linked List -

i trying create linked list download txt file , use linked list handle file line line. when handling downloaded linked list operations performed on such text editor would. encountering problems however. seems "node(string value)" section of code has wrong though original node() declaration no arguments passes. unable figure out quite is. node.h class node { public: node(); node(string value); void setnext(node *nextnode); // allows user set "next" pointer of node points friend class linkedlist; private: string data; // data box node* next; // pointer box }; node.cpp # include <string> # include "node.h" using namespace std; node::node() { data = ""; next = null; } node::node(string value) { data = value; next = null; } void node::setnext(node *nextnode) // allows user set "next" pointer of node points { this->next = nextnode; } your #include <string> ...
Read more