Recent questions tagged SQL

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Consider the following code char bar[] = "hello world "One", two, 'three'"; char *zSQL = sqlite3_mprintf(" ... () equivalent function for c++? 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 - Efficiently Include Column not in Group By of SQL Query

Given Table A Id INTEGER Name VARCHAR(50) Table B Id INTEGER FkId INTEGER ; Foreign key to Table A I wish to ... to FkId) in the query output? 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 - How to turn separate year, month and day columns into a single date?

I have a year column that contains things like 2013, 2012, etc. A month column that displays 1-12, and a ... . Can anyone provide some input? 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 - C# console application Invalid Operation Exception

using System; using System.Collections.Generic; using System.Text; using System.Data.Sql; using System ... .SqlConnection.get_ServerVersion() 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 - Enforce a foreign-key constraint to columns of same table

How to enforce a constraint of foreign key on columns of same table in SQL while entering values in the ... must be an existing employee) 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 do I compare two columns in the same table?

I would like to compare two columns in the same table. I want to be able to return all rows where ... using SQLite (more specifically WebSQL). 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 do I prompt for input from an SSIS package?

I want to be able to have a sql query in my DTSX package and I want to be able to have some sort of prompt to ... and if so how can I do it? 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 - Accessing last inserted row in mysql

On my db-server i am inserting data in a table having a auto increment field say 'id'. Now i want to ... be addressed.? Thanks in advance. 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 - Using different order by with union

I want to write a query like select top 10 * from A order by price union select top 3 * from A order by ... by price Can you please help me? 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 - What determines the locking order for a multi-table query?

Does the SQL standard specify the locking order for a multi-table query? For example, given: SELECT department.id ... than happy to answer you. 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 order by - MySQL Sort By 2 Columns

I have a table which holds information on television programs and I want to order it by Seasons and then ... but without it affecting seasons. 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 - PHP Postgres: Get Last Insert ID

I found a couple of other questions on this topic. This one... mysql_insert_id alternative for postgresql . ... of many concurrent connections? 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 - SET IDENTITY_INSERT postgresql

I'm not familiar with postgresql script. I already use this script in ms sql server : SET IDENTITY_INSERT ... in lowercase (all letters) 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 - SQL do inner join if condition met

i want a good way to improve my sql code, i have to use inner join when condition is met. I am ... @SystemMerge=0 OR @SystemMerge is null)) 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 - What is a LEFT JOIN in PostgreSQL

I've seen a query using a LEFT JOIN as opposed to an INNER or LEFT OUTER. What is a LEFT JOIN exactly? 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 - django.db.utils.IntegrityError: column "venue_city" contains null values

I have read a lot of other posts here on stackoverflow and google but I could not find a solution. It all ... ='cities_light.City'), ), ] 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 - Identifying source table from UNION query

I'm building an RSS feed in PHP which uses data from three separate tables. The tables all refer to pages ... basically the query I'm using. 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 - Make H2 treat quoted name and unquoted name as the same

H2 seems to make a difference between name with quote and name without quote. Is there a way to make it ... make those queries work with H2? See Question&Answers more detail:os...

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

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584 views

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sql server - What is the difference between Primary Key and unique key constraint?

What is the difference between Primary key And unique Key constraint? What's the use of it?? 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 - Strategies for checking ISNULL on varbinary fields?

In the past I've noted terrible performance when querying a varbinary(max) column. Understandable, but it also ... binary fields are involved? 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 - row with minimum value of a column

Having this selection: id IDSLOT N_UM ------------------------ 1 1 6 2 6 2 3 2 1 4 4 1 5 5 1 6 ... N_UM, in this case the row with id=10 (10 0). See Question&Answers more detail:os...

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

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664 views

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sql server - TSQL mutual exclusive access in a stored procedure

Several web servers access a SQL Server to get a numeric code, when this code doesn't exist, it has to be ... 'END'. What does it means? See Question&Answers more detail:os...

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

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482 views

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sql server 2008 - Update null column value from non null value in previous row

@@Version 1 Using SQL Server 2008, I am trying to cascade values down a column. I have a table with group ... blocks in this version. 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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445 views

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sql server - Most Efficient (Fast) T-SQL DELETE For Many Rows?

Our server application receives information about rows to add to the database at a rate of 1000-2000 rows per second ... , this does not happen. 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 r2 - define a computed column reference another table

I have two database tables, Team (ID, NAME, CITY, BOSS, TOTALPLAYER) and Player (ID, NAME, TEAMID, AGE), ... the database is SQL Server 2008 R2 See Question&Answers more detail:os...

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

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513 views

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sql - what is the best method to build "multilingual" script in php?

I am building a website and it need to be in 7 languages? I was wondering if there is a good practice can be ... DB , XML or in PHP file? See Question&Answers more detail:os...

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

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592 views

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sql server - Best way to design this database scenario?

Requirement is to store attachments for different entity types. Say we have 3 entity types Company , Department ... I missing something here? See Question&Answers more detail:os...

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

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608 views

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sql - How can I find duplicate consecutive values in this table?

Say I have a table which I query like so: select date, value from mytable order by date and this gives me ... is on Oracle, if it matters. See Question&Answers more detail:os...

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

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