Recent questions tagged SQl

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sql - When should you use full-text indexing?

We have a whole bunch of queries that "search" for clients, customers, etc. You can search by first name, email ... We're using SQL Server 2005. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Set IDENTITY_INSERT ON is not working

I want to copy a table Equipment from one database MyDBQA to our test database MyDB. There is an identity column ... ].[dbo].[Equipment] OFF See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server 2008 - Create SQL INSERT Script with values gathered from table

I need to create a INSERT script in order to insert in another database the same data. If in SQL Server I ... as well with a quicker solution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Convert SSMS .rpt output file to .txt/.csv

I want to export my big SSMS (SQL Server Management Studio) query result (2.5m lines, 9 fields) as .csv ... reading into my VBA program. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Group by with union mysql select query

(SELECT COUNT(motorbike.`owner_id`) as count,owner.`name`,transport.`type` FROM transport,owner,motorbike WHERE ... anyone help me please? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Is there a coalesce-like function in Excel?

I need to fill a cell with the first non-empty entry in a set of columns (from left to right) in the same ... happy if there were a simpler way. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Comparing results with today's date?

Is there a way to use the Now() function in SQL to select values with today's date? I was under the ... and therefore this would never match? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Subtract one day from datetime

I have a query to fetch date diff between 2 datetime as : SELECT DATEDIFF(DAY, @CreatedDate , GETDATE()) Ex : ... @CreatedDate- 1** , GETDATE()) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - mysql update a column with an int based on order

Lets say I have these columns uniqueID|Money|Quantity|MoneyOrder|QuantityOrder 1|23|12|| 2|11|9|| 3|99|100 ... ' order by MoneyOrder asc ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Accounting for DST in Postgres, when selecting scheduled items

I have a Postgres table of clock alarms (not really, but this is analogous, and easier to explain). Alarms are set ... , this is a Rails app.) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Multiple application using one database?

Think Design: I have many applications that share the same user database! Other tables are shared as well ... tables between the applications? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Oracle Convert Seconds to Hours:Minutes:Seconds

I have a requirement to display user available time in Hours:Minutes:Seconds format from a given total number of ... Thank you for your time. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - a proper way to escape %% when building LIKE queries in Rails 3 / ActiveRecord

I want to match a url field against a url prefix (which may contain percent signs), e.g. .where("url LIKE ?", ... "). What's the most Rails way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Autoincrement uniqueidentifier

Basically I want to use uniqueidentifier in similar way as identity. I don't want to insert values into it, It ... false and is not editable). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to find all rows with a NULL value in any column using PostgreSQL

There are many slightly similar questions, but none solve precisely this problem. "Find All Rows With Null Value ... turned up anything useful. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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329 views

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sql - How to drop all Foreign Key constraints in all tables?

I want to write sql command to drop all constraints in all tables. I searched on the internet and found the ... clear all FKs in the database. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - PostgreSQL how to create a copy of a database or schema?

Is there a simple way to create a copy of a database or schema in PostgreSQL 8.1? I'm testing ... run some comparisons against the original. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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443 views

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sql - How to convert Unix epoch time in SQLite

Could you help me convert UNIX epoch time into format yyyy-mm-dd hh:mm:ss (24h) in SQLite? (GMT+7 would ... convert UNIX epoch time in SQLite. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Remove duplicates in a Django query

Is there a simple way to remove duplicates in the following basic query: email_list = Emails.objects.order_by ... this query without duplicates? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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425 views

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sql - Pyspark: Filter dataframe based on multiple conditions

I want to filter dataframe according to the following conditions firstly (d<5) and secondly (value of col2 ... to achieve the desired result? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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575 views

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sql server - Cannot create index on view 'View_Table_Name' because the view is not schema bound

I am using Views in my stored Procedure(SQL-Server). For Improving Performance, I have tried to created INDEX of ... for View in SQL Server ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Pros & Cons of TRUNCATE vs DELETE FROM

Could someone give me a quick overview of the pros and cons of using the following two statements: TRUNCATE ... be differences between the two. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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321 views

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sql - How to select bottom most rows?

I can do SELECT TOP (200) ... but why not BOTTOM (200)? Well not to get into philosophy what I mean is, how ... you'd expect BOTTOM to do...)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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sql server - SQL count consecutive days

This is the SQL database data: UserTable UserName | UserDate | UserCode --------------------------- ... 3 Is this possible using only SQL query? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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431 views

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sql - Select Nth Row From A Table In Oracle

How can I select the Nth row from a table in Oracle? I tried SELECT PRICE FROM AAA_PRICING WHERE ROWNUM = 2 but that didn't work. Please help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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253 views

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sql - Understanding spark physical plan

I'm trying to understand physical plans on spark but I'm not understanding some parts because they seem ... not finding anything concrete. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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311 views

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sql - MySQL SELECT query string matching

Normally, when querying a database with SELECT, its common to want to find the records that match a given ... string argument to the query. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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367 views

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sql - Want to learn more on NTILE()

I was reading on RANKING function for ms sql. I understand the others function except NTILE(). Lets say if ... (3)? Simple explaination anyone? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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