DO NOT USE this for questions targeting Microsoft SQL Server, use the tag sql-server instead. "SQL" is an acronym for "Structured Query Language", it is used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. ...

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3
votes
1answer
82 views

How to check foreign keys related to a table

How to see foreign keys related to a table in MySql? Background : I wanted to drop a table in MySql which has a foreign key constraint. When I do it I get this: Error Code: 1217. Cannot delete or ...
3
votes
1answer
71 views

How is encoding done in SQL database tables for pattern matching?

Are strings in table columns represented as bit patterns or Unicode? Does the database engine bring them into memory in a different representation character set from the disk-persisted ...
0
votes
0answers
23 views

For any SQL query, do there exists a unique translation into relation algebra

I have been studying databases and I understand that for each query that a database user type, the DBMS translate them into relational algebra operations before applying them to the database. My worry ...
2
votes
1answer
44 views

Query to flatten schema

I have the following tables and columns: Users id | other-non-important-columns Containers id | Users_id | other-non-important-columns Content id | Container_id | other-non-important-columns ...
1
vote
1answer
59 views

Find all tables that are related to a view recursively sql server

I have a view-A that is comprised of other views (View-B View-C) and I would like to list all the tables that used by View-A (which would include the tables used in View-B and View-C). When I use ...
0
votes
0answers
30 views

Need some help building a query to get info from several tables

I have this semi-complex table structure: And I need to return this data: { "id": "10111001", "rep_id": "30000001", "targets_id": "60011001", "brands_id": "10010001", "brand_name": ...
1
vote
1answer
52 views

How to get row count from all tables of a schema ( without using information schema )

The query should collect data from table name , schema name from information.schema and row count should be taken from actual table.
0
votes
1answer
58 views

Arithmetic operations on a table

can anyone give me some advice on the following situation: I have two basic tables: Then a view created by the two: select product.IDPRODUCT, sum(quantity) as totalOut, PRODUCTSTORAGE.DATAINPUT, ...
2
votes
3answers
72 views

SQL actually executed as planned in ORACLE?

I wonder if SQL is definitely executed as execution plan. I mean.. is the actual SQL execution process always consistent with execution plan, i.e. does the same SQL always give the same plan?
2
votes
1answer
36 views

Dividing values from a single column into 2 based on a rule

I am trying to create an SQL query to divide into 2 separate columns based on a rule. My table is as follows Name | Item ID | Parent ID ----- | -------- | ---------- A | 1 | Null B ...
0
votes
1answer
38 views

How to insert UNIQUE IDs values from several tables into events table

I have a table called events defined as follow: rep_id, hcp_id, brand_id, email_id and content_id is the IDs in other tables. event_type should be kind of array containing this values: [ ...
0
votes
1answer
21 views

Function for generate a huge and possible random relationship between tables

I have this two tables and N:M relationship between them: Let's said I am managed to create a lot of media and emails records but I need to create the relationship between them. I can do this ...
1
vote
1answer
137 views

Selecting rows from same name table from multiple databases in single result set

For some reason, I have a table Table_1 in n databases (same name and schema structure) instead of one single databases. The columns are like this: | Column_1 | Column_2 | I can select data from ...
1
vote
0answers
50 views

SQL 2008 R2 Agent stopping sp_who2 running and can't view database or Agent properties

We're experiencing an unusual issue with SQL 2008 R2 SP2 (10.50.4297) where the SQL Agent had stopped but would not restart (this has been fine for months). After investigating the issue we had to ...
0
votes
2answers
33 views

Insert data into table where 4 fields are the same and the fifth changes

I have a table with this structure: username varchar(35) startdate datetime enddate datetime saledate datetime packageid int for each username there are 5 packages, so one username has 5 records ...
2
votes
2answers
124 views

Slow Performance caused by Correlated Sub-queries & Clustered Index Seek

I'm running a query in which one of the tables (FIELDDATA) has nearly 400,000 records which is taking more than 2 minutes to execute. I ran the execution plan, and noticed that the clustered seek ...
0
votes
1answer
38 views

Usage of ExecSQL in UDF?

Problem: is it possible to use sp_executesql or EXEC inside of a user defined function? Thanks!
0
votes
0answers
28 views

How to connect to a |Database from SQL Script, in SQL developer

Hi i am trying to connect to a DB using a connection string mentioned in a Script file.. in SQL developer. I am using the below format Connect USERNAME/PASSWORD@HOSTNAME:PORT/Service_name.. But its ...
0
votes
1answer
32 views

Passing filter params to a sub query

I'd like to create a view from the query below, but the query contains a sub query which I need to apply a filter to (the place is marked with a comment). I'm wondering if it's possible somehow to ...
1
vote
1answer
54 views

Generate rows based on value in 2 columns. Bug?

I have the following table in Oracle: ID START END _ID01 AB050 AB100 _ID01 AB101 AB150 _ID02 AB0251 AB0300 _ID01 AB00301 AB00302 I want to generate as many rows and every ...
1
vote
2answers
69 views

How to pull number code from strings buried in parentheses?

I have string data (ProductDescription) that includes product names and ID numbers and need to pull the ID numbers for cross-referencing... Data Samples: Widget (1234) Different Widget (123) Many ...
0
votes
1answer
14 views

How do I get the some of the values from 2 foreign keys in a table?

I've spent a good amount of time on this but, still have no idea as to the sql query I can use to get the student name, and class name from the payments_per_student table. edit: This using JPA work ...
1
vote
1answer
33 views

Optimize view (and underlying table) for averaging timestamps into hours

I have this table: CREATE TABLE spp.rtprices ( "interval" timestamp without time zone NOT NULL, rtlmp numeric(12,6), rtmcc numeric(12,6), rtmcl numeric(12,6), node_id integer NOT NULL, ...
1
vote
3answers
53 views

SQL self join with condition

I have table like: bu_id bu_name parent_id 1 DefaultBU NULL 601 bu1 1 602 bu2 601 603 bu3 NULL 604 bu4 603 I want to retrieve the ...
-2
votes
1answer
39 views

Usage of COALESCE? [closed]

Today: table abc a b c d ---- ---- ---- ---- 1 null 2 3 null null null 7 null 5 null 4 1 = e 7 = b 5 = f 3 = i 2 = w 4 = o The Goal is to retrieve this ...
0
votes
1answer
36 views

Options for structuring multiple associations to a record

This is 101 level stuff and I promise to read a book later, but in the meantime, given the following three tables: Product --------- ProductId (uniqueidentifier) User --------- UserId ...
7
votes
1answer
891 views

Why 0 is equal to empty string?

I need some help in finding why the following T-SQL statement returns 1 (true): SELECT IIF( 0 = '', 1, 0) I guess someone has change an ANSI option like SET ANSI_NULLS or something else that is ...
0
votes
2answers
58 views

Single query for searching for records without knowing what the search column is for

I have a single line search where i should be able to search for address or city or zip or state. I should be able to show data of what ever that matches for the typed in word. Suppose user had typed ...
3
votes
1answer
99 views

How to index for timestamp queries

I have a products table where I insert around 150,000 records a day. Most of them are redundant, but I need to keep them because of the new expiration date. I get product feeds from about 5 vendors a ...
0
votes
0answers
35 views

Insert Unique Records into Linked Server Table (from SQL to Oracle)

My issue is that I am trying to load only unique primary key records into oracle from sql. In the insert into stored proc statement I tried doing it by where primary key does not equal primary key ...
0
votes
2answers
61 views

Database Design - Cardinality

I am currently studying for my MTA Database Fundamentals cert, and I came across this question during my studies. However, the answer doesn't make any sense to me. Here is the question/answer: It ...
0
votes
1answer
31 views

Postgres: Disable “similarity” column output on “SELECT SIMILARITY”?

I've tried disabling similarity column output on SELECT SIMILARITY but still cannot. Below query will generate a column similarity: SELECT SIMILARITY(title, 'Nation'), title FROM gallery WHERE title ...
1
vote
3answers
55 views

Load specific element from XML

I have the following xml: <root> <123 type="line"> <aa type="item"> <value>1</value> </aa> </123> <234 type="line"> <bb type="item"> ...
0
votes
1answer
30 views

How to serialize on SQL server metadata?

I tried to find an answer in Kalen Delaney's SQL Server Concurrency but there is no mention of metadata. The problem is how to ensure that only one of these reads and index creates executes from one ...
5
votes
2answers
89 views

Why do so many queries have aliases? [closed]

I've spent a lot of time searching for, researching and implementing various complex MySQL queries over the last several years. Many of them use lots of aliases for tables, even when none are ...
0
votes
0answers
36 views

What is wrong with my ERD?

I am trying to create a reservation/booking ERD. Is their anything wrong with my current ERD? It must show a supertype and subtype, and it must identify attributes for regular, weak, and associative ...
1
vote
1answer
58 views

How to Get one Single statement of two table value in SQL

I wanted to retrieve two table values in one single statement such as, (Example Bank statements..) Table 1: Invoice SELECT ClientNo, InvoiceDate, InvoiceNo, TotalDue FROM Invoice_TBL WHERE ...
6
votes
2answers
69 views

Select lowest ID and calculate deviation from the lowest

I'm trying to create a view. I have some data in my SQL Server database, and I want to order them by their mark1 and mark2. Now when I sort them I want to select the mark1 who has the lowest mark2 and ...
1
vote
4answers
66 views

Getting an aggregate (here: min) for a group of values [closed]

Example table: ID | value A | value B ---------------------- 1 | abc | 3 1 | def | 5 1 | ghi | 1 2 | cba | 9 2 | fed | 4 I want the ...
0
votes
1answer
19 views

How do I merge two rows only if there is the TagWidgetIds are same but the tagValues are different?

I have this stored procedure which generates the following output. The query which generates the output from the stored procedure is as follows: SELECT tat.[agent-id], ...
0
votes
2answers
53 views

How to get several specific records from a query result?

I know by using Like with "LIMIT 1, OFFSET x" I can get the Xth record from a returned query result. But what if I want to get X, Y, and Z all at once? Currently I do a for loop and it's like I'm ...
0
votes
2answers
46 views

How can I find table name for each row result?

How can I find the table name for each row result in my query? I have tried ideas suggested on the stack network (overflow, dba) 1 How to make a table name an attribute in PostgreSQL? 2 ...
2
votes
1answer
80 views

How to display the query result separately for each item in an IN clause? [closed]

Maybe it's a novice question, but I am trying to get the sum of balances for each account present in the table. I am trying the below Select SUM(BALANCE) from dbo.account_balances ...
0
votes
0answers
12 views

SQLAnywhere: How to apply function to list members?

I'm a newbie to SQL Anywhere... what a difference from the big O! I'm working in SQL Anywhere 12. I have a query that returns a column values that are a list of big int numbers, EXAMPLE: ...
0
votes
0answers
39 views

Find the Minimal Basis

Suppose we have relation R ( A ,B ,C ,D ,E ) , with some set of functional dependencies, and we wish to project those functional dependencies onto relation S(A, B, C). Given the functional ...
2
votes
1answer
96 views

search xml column inside large table (7 million rows)

Database design: Table Name : Plays ( 6 million records) Columns: Play id, col1, col2......col7, PlayFieldValues PlayFieldValues xml column. sample xml stored in this column <PlayAttributes> ...
0
votes
1answer
37 views

Select records as groups based on sequence and date

I have data stored as: CompID | Seq | Udate | Utime --------+-----+-----------+------- mx433 | 1 | 1/1/2012 | 13:54 mx433 | 1 | 1/2/2012 | 13:43 mx433 | 2 | 1/4/2012 | 14:23 mx433 ...
0
votes
0answers
47 views

I want to sync local mysql database and live server mysql database

My plan is to store data in my local MySQL database and after a time interval or when system connected to internet it will update my live MySQL database remotely Is it possible? I'm have a inventory ...
1
vote
1answer
38 views

Selecting the correct row given multiple input value combinations

I have a table that stores part numbers for various items like so: +------+-------------+-------------+-------------+ | Item | Color | Type | Part Number | ...
4
votes
1answer
101 views

Finding all joins required to programmatically join a table

Given a SourceTable and a TargetTable, I would like to programmatically create a string with all joins required. In short, I am trying to find a way to create a string like this: FROM SourceTable t ...