Trending questions in Database

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What does SELECT COUNT(1) from table_name on any database table mean

An expression to be tested for each ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 86,360 points • 1,004 views
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SQL Server: Extract Table Meta-Data (description, fields and their data types)

Unfortunately, you have to utilize sysobjects/syscolumns to ...READ MORE

Sep 17, 2022 in Database by narikkadan
 • 86,360 points • 1,075 views
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How to retrieve the current version of a MySQL database management system (DBMS)?

Many responses advise using mysql —version. But ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 86,360 points • 943 views
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IN Clause with NULL or IS NULL

An in statement will be parsed identically to field=val1 or ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 86,360 points • 927 views
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How do I create a table based on another table

Although CREATE TABLE AS... SELECT does exist ...READ MORE

Sep 12, 2022 in Database by narikkadan
 • 86,360 points • 1,253 views
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Using ORDER BY and GROUP BY together

Correctly use the  group by: select l.* from table ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 86,360 points • 903 views
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Using RegEx in SQL Server

Because LIKE can be used instead of managed ...READ MORE

Sep 12, 2022 in Database by narikkadan
 • 86,360 points • 1,247 views
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What does "DISTINCT ON (expression)" do?

The snippet from the Official documentation for PostgreSQL is ...READ MORE

Sep 16, 2022 in Database by narikkadan
 • 86,360 points • 1,076 views
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SQL server invalid object name - but tables are listed in SSMS tables list

I'm trying to develop a stored procedure ...READ MORE

Sep 3, 2022 in Database by Kithuzzz
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Unpivot with column name

Your inquiry is quite near. The following ...READ MORE

Sep 16, 2022 in Database by narikkadan
 • 86,360 points • 1,043 views
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How to see the real SQL query in Python cursor.execute using pyodbc and MS-Access

I use the following code in Python ...READ MORE

Sep 4, 2022 in Database by Kithuzzz
 • 38,000 points • 1,572 views
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1 answer

How can I set an SQL Server connection string?

.NET DataProvider -- Standard Connection with username ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 86,360 points • 901 views
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How to SUM two fields within an SQL query

The sum of two fields that are ...READ MORE

Sep 5, 2022 in Database by Kithuzzz
 • 38,000 points • 1,452 views
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What is the use of a cursor in SQL Server?

Instead of receiving a result set as ...READ MORE

Sep 13, 2022 in Database by narikkadan
 • 86,360 points • 1,126 views
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How to upsert (update or insert) in SQL Server 2005

Try to check for existence: IF NOT EXISTS ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 86,360 points • 907 views
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How to execute function in SQL Server 2008

The function appears not to be being ...READ MORE

Sep 11, 2022 in Database by narikkadan
 • 86,360 points • 1,168 views
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How can I add the sqlite3 module to Python?

Can someone please explain how to install ...READ MORE

Sep 6, 2022 in Database by Kithuzzz
 • 38,000 points • 1,332 views
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1 answer

How can I confirm a database is Oracle & what version it is using SQL?

Run this SQL: select * from v$version; Output: BANNER ---------------------------------------------------------------- Oracle Database ...READ MORE

Sep 12, 2022 in Database by narikkadan
 • 86,360 points • 1,084 views
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1 answer

Difference between EXISTS and IN in SQL?

Although the exists keyword can be used ...READ MORE

Sep 11, 2022 in Database by narikkadan
 • 86,360 points • 1,108 views
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Query comparing dates in SQL

I have a table containing dates for ...READ MORE

Sep 12, 2022 in Database by Kithuzzz
 • 38,000 points • 1,099 views
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1 answer

CASE .. WHEN expression in Oracle SQL

Use an IN clause. Example: SELECT status, CASE ...READ MORE

Sep 17, 2022 in Database by narikkadan
 • 86,360 points • 856 views
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SQL Update from One Table to Another Based on a ID Match

Account and credit card numbers are stored ...READ MORE

Aug 22, 2022 in Database by Kithuzzz
 • 38,000 points • 1,578 views
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Get the last inserted row ID (with SQL statement)

When you add a new record to ...READ MORE

Aug 20, 2022 in Database by Kithuzzz
 • 38,000 points • 2,061 views
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How to convert date into timestamp in SQL query?

I'm attempting to move data from the ...READ MORE

Aug 19, 2022 in Database by Kithuzzz
 • 38,000 points • 2,003 views
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0 answers

I want to use CASE statement to update some records in sql server 2005

UPDATE dbo.TestStudents SET LASTNAME = ( ...READ MORE

Sep 2, 2022 in Database by Kithuzzz
 • 38,000 points • 1,391 views
0 votes
1 answer

How to calculate student pass percentage in excel

Percentage formula in Excel In cell D2, type ...READ MORE

Apr 6, 2022 in Database by gaurav
 • 23,580 points • 7,836 views
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1 answer

How to download excel in response from api react.js

Create ReactJS project import React, { Component } ...READ MORE

Mar 31, 2022 in Database by gaurav
 • 23,580 points • 8,138 views
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1 answer

How do I run an sql query in php?

Try this: <?php $conn = new mysqli('localhost', 'jaydeep_mor', 'jaydeep_mor', ...READ MORE

Sep 10, 2022 in Database by narikkadan
 • 86,360 points • 1,093 views
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UPDATE and REPLACE part of a string

A table I have has two columns: ...READ MORE

Aug 28, 2022 in Database by Kithuzzz
 • 38,000 points • 1,571 views
0 votes
1 answer

SQL SELECT from multiple tables

Try this: SELECT p.pid, p.cid, p.pname, c1.name1, c2.name2 FROM ...READ MORE

Sep 16, 2022 in Database by narikkadan
 • 86,360 points • 792 views
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SQL Server PRINT SELECT (Print a select query result)?

I want to print a particular value; ...READ MORE

Aug 9, 2022 in Database by Kithuzzz
 • 38,000 points • 2,333 views
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SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

I've been attempting to solve a significant ...READ MORE

Aug 22, 2022 in Database by Kithuzzz
 • 38,000 points • 1,847 views
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How do you create a yes/no boolean field in SQL server?

How should a yes/no, or boolean, field ...READ MORE

Sep 5, 2022 in Database by Kithuzzz
 • 38,000 points • 1,171 views
0 votes
1 answer

SQL Server WITH statement

I'm going to guess because I don't ...READ MORE

Sep 10, 2022 in Database by narikkadan
 • 86,360 points • 1,001 views
0 votes
1 answer

Add primary key to existing table

You have to drop constraint and recreate ...READ MORE

Sep 12, 2022 in Database by narikkadan
 • 86,360 points • 913 views
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SQL update query using joins

A value that is returned from a ...READ MORE

Sep 6, 2022 in Database by Kithuzzz
 • 38,000 points • 1,074 views
0 votes
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SQL Error: ORA-00942 table or view does not exist

I'm using SQL Developer, and after creating ...READ MORE

Sep 4, 2022 in Database by Kithuzzz
 • 38,000 points • 1,244 views
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How to convert SQL Server's timestamp column to datetime format

Is there a simple way to convert ...READ MORE

Aug 21, 2022 in Database by Kithuzzz
 • 38,000 points • 1,812 views
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HAVING without GROUP BY

Does the following make sense in terms ...READ MORE

Aug 21, 2022 in Database by Kithuzzz
 • 38,000 points • 1,736 views
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When to use "ON UPDATE CASCADE"

I frequently use ON DELETE CASCADE, but ...READ MORE

Aug 25, 2022 in Database by Kithuzzz
 • 38,000 points • 1,559 views
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Efficiently convert rows to columns in sql server

I need to deal with a lot ...READ MORE

Sep 3, 2022 in Database by Kithuzzz
 • 38,000 points • 1,226 views
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SQL Server® 2016, 2017 and 2019 Express full download

Previous versions of SQL Server Express were ...READ MORE

Sep 6, 2022 in Database by Kithuzzz
 • 38,000 points • 1,094 views
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0 answers

Vendor code 17002 to connect to SQLDeveloper

When using SQLDeveloper to connect to a ...READ MORE

Sep 2, 2022 in Database by Kithuzzz
 • 38,000 points • 1,182 views
0 votes
0 answers

What is wrong with my SQL here? #1089 - Incorrect prefix key

CREATE TABLE `table`.`users` ( ...READ MORE

Sep 3, 2022 in Database by Kithuzzz
 • 38,000 points • 1,197 views
0 votes
1 answer

Get list of databases from SQL Server

Execute: SELECT name FROM master.sys.databases I hope this helps ...READ MORE

Sep 10, 2022 in Database by narikkadan
 • 86,360 points • 884 views
0 votes
0 answers

How to generate a Guid in SQL Server?

I have to make a SQL Id ...READ MORE

Sep 5, 2022 in Database by Kithuzzz
 • 38,000 points • 1,028 views
0 votes
0 answers

How to create a table from select query result in SQL Server 2008

I tried to build a table from ...READ MORE

Sep 2, 2022 in Database by Kithuzzz
 • 38,000 points • 1,036 views
0 votes
0 answers

The node to traverse cannot be null (Hibernate SQL)

I'm using hibernate to run the following ...READ MORE

Aug 23, 2022 in Database by Kithuzzz
 • 38,000 points • 1,571 views
0 votes
0 answers

SQL Server database restore error: specified cast is not valid. (SqlManagerUI)

For my production website, SQL Server 2008 ...READ MORE

Aug 20, 2022 in Database by Kithuzzz
 • 38,000 points • 1,760 views
0 votes
0 answers

SQL Server : Arithmetic overflow error converting expression to data type int

I'm getting this error: msg 8115, level 16, ...READ MORE

Aug 26, 2022 in Database by Kithuzzz
 • 38,000 points • 1,432 views
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