A core SQL statement, SELECT retrieves data from one or more tables or other sources of row set data such as views or table-valued functions.

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21 views

How can I combine join and random choice from one table but 2 conditions?

I want to choose 200 entries randomly from a table However, I have two conditions the first 100 should be white and the other black. How can I join them? One possibility to do is to run following ...
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1answer
22 views

Setting An Order For Specific Fields Using SELECT and ORDER BY

So I'm writing a query to show the hire_date, job_id and last name where the last name= 'Matos' and 'Taylor and the hire_date is in ascending order. When executing this code: SELECT last_name, ...
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3answers
499 views

Lock mysql table to prevent select and insert at the same time

I know this question has been asked earlier and I have also read the documentation. But I guess I'm stupid not understand. I have a code that inserts a row and the row should be unique in several ...
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2answers
75 views

Which row is selected by DISTINCT?

I have a table with products with names in different languages: product-id | lang-no | name Now I want to generate product lists with names in each language. Unfortunately I don't have all names in ...
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1answer
56 views

SELECT TOP (or MAX) for each Specific value [closed]

Lets say i have this table ____________________________ | EmployeeID | Sales | |------------|-------------| | 1 | 300 | | 1 | 350 | | 2 | 400 ...
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57 views

MySQL Match … Against query very slow

I work on a website running on Propel ORM and I have this query: if(isset($args["QueryText"]) && $args["QueryText"] != "") { $query = $query ->withColumn("(MATCH (Request.Subject, ...
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3answers
63 views

Using the name of an “AS” column in the WHERE clause

I have the following query in mysql: SELECT voter_id, first, middle, last, title, party, phone, ward, households.hh_id, households.hh_long, voters.1311 + voters.1111 + voters.0911 + voters.0909 + ...
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1answer
32 views

Update rows in a table with an index column starting from 0 with consecutive numbers

I have a few tables in a Oracle db with some "rule": The INDEX_COLUMN must start from 0 and must be consecutive numbers and the column NRCRT must start from 1 and also consecutive numbers. I've made a ...
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1answer
34 views

Select Unique Fields with Max Values in Each?

I have a table with names, numbers, and timestamps on the data. I want to know how to select a unique instance of each name based on how recent the timestamp is. Addy (text), NW (number), UDate ...
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0answers
35 views

Matching same unknown characters in two columns

So here is the situation. I have a database with values in columns that look something like this field_0_data1, field_0_data2, field_1_data1, field_1_data2 Is it possible to only select the columns ...
0
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1answer
66 views

How to find the price based on the given range

Here i need to find the price of the qty based on which price range the qty lies. In the first date(2015/01/01) 5 quantities have been sold and we made entries from (1 to 5) ,On second day for 10 ...
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34 views

Find the last record of group of overlapped records

I have a little dilemma with filtering out result. The result and what I want to achieve is not very trivial and I didn't find an answer anywhere after extensive search. So here is my problem: I ...
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2answers
48 views

sql problem with multiple linked tables

I have an Oracle db and the following tables: raportor: id id_pct_lucru 58382 327342 ses_rap id an status 1 2012 I 21 2013 I 41 2014 D ch_trat id fk_id_raportor ...
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2answers
39 views

Granting Select access to all tables within a specific Database in MS SQL

I have a server that has multiple databases that are contained within that same server/project. I am using MS SQL Server 2012. I have a special role set up with 3 users that are apart of that role. I ...
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0answers
28 views

a student with multi race code in a column transpose to a row [duplicate]

studentid racecd --------- ------ 1780 400 1780 500 1780 700 change to studentid race1 race2 race3 --------- ----- ----- ----- 1780 400 500 ...
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62 views

rows to columns using SQL , merge queries

I would like to merge these two queries: SELECT um.user_id, um.meta_value, u.display_name, u.user_email, u.user_url, t.name FROM wp_usermeta um INNER JOIN wp_users u on u.id = um.user_id INNER JOIN ...
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0answers
61 views

Fetching from parent/child table pairs

Let there are two tables: "parent" and "child" related by 1:n relation (to every "parent" row there correspond any number of "child" rows). Suppose we need to fetch a subset of parent table with all ...
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2answers
58 views

select where column with a %

How can I select all records with a % in? I think this code doesn't work. SELECT column1, column2 FROM table WHERE column1 LIKE '%%%' first and last % for zero, one or more chars second % for the ...
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2answers
3k views

WHERE clause is not filtering on LESS THAN and GREATER THAN or BETWEEN

I am trying to select MTR values that are between the values of 0 and 4. What am I doing wrong? SELECT DATEDIFF(M, TheDate, TheOtherDate) AS MTR FROM MyTable WHERE MyID = 2074163 AND MTR >= 0 ...
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2answers
67 views

How to get the value of column that the same for few rows by selecting values from other columns?

Since I am not a MySQL expert, I am having trouble determining how to ask a search engine for advice on this topic. I have the following table: +------------+--------------+-------------------+ | ...
0
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1answer
53 views

Prioritizing values in select statement in ORACLE

Due to the JOIN for the communication method (Phone, email etc) we get alot of duplicates because a company can have multiple communication methods (CICM.CLIENT_VALUE). My question is... Is there a ...
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1answer
30 views

putting together contents of XML column - from all rows of a table - how to get it done without a “while”?

I have a table called sizeguide with the definition you can see below. I am interested in the SizeGuideXML column, which is type XML. I had a mission the objective was, for each SizeGuideDesc, get ...
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36 views

MySQL - SELECT Columns from results of another Query [duplicate]

I'm trying to use a dynamic range of columns fetched from another query, specifically I want the results of this query: SELECT COLUMN_NAME as DYNAMIC_COLUMN FROM information_schema.columns WHERE ...
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1answer
65 views

Select not repeated results from same tables in different databases

I have 3 tables in 3 different databases which are exactly the same. I'm trying to sync from this 3 databases to a master database as shown in the picture below: Right now I am running the same ...
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1answer
111 views

Count distinct values of a column and insert them to another table

So, I have a database for logs and statistics. But, the amount of data sent is too high, so I was thinking of grouping the data into another table. So the structure of the original Database is: ID ...
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2answers
116 views

Error on simple Select statement: Subquery returned more than 1 value

When I query a table select * from tableName it returns error msg Msg 512, Level 16, State 1, Line 2 Subquery returned more than 1 value. This is not permitted when the subquery follows =, ...
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2answers
75 views

Query to know who paid more than 10k

I have a table with payment informations, like this: ID COSTUMER_ID DATEPAID AMOUNT 1 1 2012-01-01 50 2 1 2012-02-01 100 3 1 2012-03-01 70 4 2 ...
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1answer
27 views

Selecting different variables depending on another variable [closed]

I must make a new table with filling up fields depending on a variable. If type = holder, then I should take the enterprise field, if type = requester, I should take the name. How do i write this in ...
4
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1answer
549 views

Search a Redis Database

Imagine having a tun of hashes in a Redis Database, each representing a user object. How would you get the user with for example the lowest registration date? The user where ts_registered is the ...
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1answer
215 views

selecting same column twice for different value

I have a table like this; event_id pair versus score 1 1 11 100 1 1 12 0 ... 1 11 1 0 1 12 1 50 Now I want to ...
0
votes
1answer
89 views

Select last record from my table [closed]

I am new to SQL and PHP. I'm having a problem with selecting the last record from my table. I run the following query: SELECT * FROM 2521118 ORDER BY id DESC LIMIT 1 My table name is 2521118 and ...
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2answers
364 views

MySQL: Show list of tables with paging in Terminal

I am using MySQL Ver 14.14 Distrib 5.5.44 for debian-linux-gnu. How can I show my tables page wise in a terminal?
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3answers
80 views

Generate a list from columns that do not contain a zero for each row

I have a table TAB1 in an Oracle database: +----+----+----+----+----+----+ | ID | C1 | C2 | C3 | C4 | C5 | +----+----+----+----+----+----+ | 1 | 1 | 0 | 3 | 0 | 5 | | 2 | 11 | 22 | 0 | 44 | ...
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3answers
29 views

I want a select to give me id's that are not in a consecutively order

I have an Oracle db with a table like this: +----+-------+ | ID | INDEX | +----+-------+ | 1 | 0 | | 1 | 1 | | 2 | 4 | | 2 | 5 | | 2 | 6 | | 3 | 0 | | 3 | 1 | | 3 ...
2
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1answer
196 views

Selecting most recent date when dates are stored in another table

Working in a MySQL database, I have tables set up like this: Table song_instances has song_id (int), meeting_instance_id (int) The meeting_instances table has columns meeting_instance_id (int), ...
5
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1answer
181 views

Exactly what error is returned by PostgreSQL `FOR UPDATE NOWAIT` when a selected row cannot be locked immediately?

The PostgreSQL 9.4 documentation states that adding the NOWAIT option to a SELECT FOR UPDATE means an error is generated when a row cannot be locked: To prevent the operation from waiting for ...
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2answers
545 views

Select only those records that have different/multiple values for a particular column

Below is an example of my membership table. There some records having multiple values in the email field. I only want to select those records that have multiple email values: Member table ID ...
3
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1answer
41 views

Extra “count” row with total of 0

Consider the following: db=> SELECT ga, count(ga) FROM gb GROUP BY ga ORDER BY ga ; which gives the following output: ga | count ---+------ ? | 200 A | 100 B | 50 | 0 (4 rows) ...
2
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1answer
85 views

Select last row for a certain group

I have two tables: Table users columns | type | notes --------|--------|------- id | bigint | PK ... | ... | ... Table events columns | type | notes ...
0
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1answer
45 views

Recommended Database(s) for Selecting Random Rows

I'm familiar with selecting random rows from a table in PostgreSQL. It's really slow. I've looked into some other databases and they all seem to be bad at it. Mostly because it's not a normal use case ...
2
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4answers
313 views

WHERE NAME LIKE ( A SET OF NAMES )

I would like to drop all the jobs related to a set of specific databases. So I have added all the names into a table variable and I was trying to generate the scripts to drop the jobs. how can I ...
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2answers
269 views

Select Between Date Range Mysql

I want to select records between 2 dates: select * from orders where orders.created <= '2015-07-31'; select * from orders where orders.created >= '2015-07-01' and orders.created <= ...
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0answers
40 views

Row locks on selects

select t.*, row_number() over ( partition by t.Entity_Identifier order by t.Message_Sequence ) as seqnum from Process_Activity t (ROWLOCK) where t.Process_Id = Is it possible for ...
4
votes
1answer
97 views

Fast alternative for “NOT IN”

I have a table A that got a field called id that is the primary key of this table. I also have a table called B which also have a field called id as primary key. Now I want to get all rows from ...
1
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4answers
891 views

MSSQL Select all parent rows for which exists a combination of children rows with desired value

I would like to select all parent rows for which exists a combination of children rows with desired value. The easiest approach is to use multiple exists clauses, but this is not optimal - anyone ...
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2answers
56 views

MYSQL Select, where rows exists

I have a Mysql Database and tables with the structure: Table 'photos' - ID, Name Table 'photos_tags' - Key, Photo_ID, Tag My goal is to select all photos, which has one tag (it's not a problem) ...
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3answers
149 views

If in mysql I have string `xxx yyy` - how can I SELECT this if user input `xxxyyy`?

My online-shop in PHP (OpenCart). On site we have product-search. For example product have name iSport 220, and if user search input string is iSport220 we must show this product. And vice versa. ...
2
votes
2answers
65 views

Cannot build correct SELECT in MySql

Please help me to create a correct MySql query, which I failed to do. I have 2 tables in our DB: CREATE TABLE IF NOT EXISTS `user_audit` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, ...
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2answers
56 views

PostgreSQL, merge join results

I have 2 tables with common columns and would like to know if it's possible to request this 2 tables by merging the results. Table "job" : parent_id, target_id, start_date, end_date, jobposition_id ...
3
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1answer
55 views

How to Choose Between VALUES and SELECT for INSERT?

This answer raised the question for me how to choose between VALUES and SELECT in such a function . Using PostgreSQL 9.4.3 on x86_64-unknown-linux-gnu, compiled by gcc (Debian 4.9.2-10) 4.9.2, 64-bit: ...