connect-by

I need help with a oracle query. Here is my setup: I have 2 tables called respectively "tasks" and "timesheets". The "tasks" table is a recursive one, that way each task can have multiple subtasks. Each timesheet is associated with a task (not necessarily the "root" task) and contains the number of hours worked on it. Example: Tasks id:1 | name: Task A | parent_id: NULL id:2 | name: Task A1 | parent_id: 1 id:3 | name: Task A1.1 | parent_id: 2 id:4 | name: Task B | parent_id: NULL id:5 | name: Task B1 | parent_id: 4 Timesheets id:1 | task_id: 1 | hours: 1 id:2 | task_id: 2 | hours: 3 id:3 |

I am facing an issue using connect by. I have a query through which I retrieve a few columns including these three: ID ParentID ObjectID Now for the same ID and parentID , there are multiple objects associated e.g. ID ParentID ObjectID 1 0 112 1 0 113 2 0 111 2 0 112 3 1 111 4 1 112 I am trying to use connect by but I'm unable to get the result in a proper hierarchy. I need it the way it is showed below. Take an ID - parentID combo, display all rows with that ID-parentID and then all the children of this ID i.e. whose parentID = ID ID ParentID ObjectID 1 0 112 1 0 113 3 1 111 4 1 112 2 0 111 2

I have a query requirement from ----. Trying to solve it with CONNECT BY , but can't seem to get the results I need. Table (simplified): create table CSS.USER_DESC ( USER_ID VARCHAR2(30) not null, NEW_USER_ID VARCHAR2(30), GLOBAL_HR_ID CHAR(8) ) -- USER_ID is the primary key -- NEW_USER_ID is a self-referencing key -- GLOBAL_HR_ID is an ID field from another system There are two sources of user data (datafeeds)... I have to watch for mistakes in either of them when updating information. Scenarios: A user is given a new User ID... The old record is set accordingly and deactivated (typically a

Can now pull the data, but am wondering if there is a better way to optimize the query for large data sets. http://sqlfiddle.com/#!4/0ef0c/5 So basically I want to be able to supply the query a given org id and have it recursively pull its parents, its children, its siblings and its aunts and uncles. And then pull any Activities that are associated with that org hierarchy. Org1 is the top level org, but it may or may not have a null parent. Basically I was doing an up and down query to pull the children and the parent, but can only seem to get the siblings by adding another query. Finally got

Does PostgreSQL have a pseudo-column like "LEVEL" in Oracle? If not, then how can we create a column similar to "LEVEL"? Erwin Brandstetter Postgres does not have hierarchical queries . No CONNECT BY , therefore also no LEVEL . The additional module tablefunc provides the function connectby() doing almost the same. See: What is the equivalent PostgreSQL syntax to Oracle's CONNECT BY ... START WITH? Or you can do similar things with a standard recursive CTE and a level column that's incremented with every recursion. This query in Oracle: SELECT employee_id, last_name, manager_id, LEVEL FROM

I would like to show a tree structure in SQL with child nodes and parent nodes. I have a table like: Employee ------------- ID (int) FirstName (varchar) LastName (varchar) ParentID (int) Job (varchar) which represents an employee. ParentID represent the manager of the employee has. I would like to have this table only with this structure. I would like to show the whole tree structure. I would like to show only the children nodes I would like to show only the parent nodes SampleDataImage Query - The whole tree structure : SELECT * FROM Employee START WITH ParentID IS NULL CONNECT BY PRIOR ID =

Oracle ships with a very handy feature. You can create hierarchical queries (recursive behaviour) using the following clause: CONNECT BY [NOCYCLE] {condition [AND condition...]} [START WITH condition] As documented here: http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/queries003.htm I'm wondering, are there any other established RDBMS that support an equivalent or similar syntax? Or can recursive behaviour like this be generically simulated using regular SQL? A good example that I'd like to be able to simulate is this (taken from the Oracle documentation): SELECT LPAD(' ', 2 *