Most voted questions in Database

+2 votes
1 answer

How to export data from MySql to a CSV file?

If you are using MySql workbench then ...READ MORE

Jan 4, 2019 in Database by Priyaj
 • 58,090 points • 1,207 views
+2 votes
3 answers

Difference between SQL and PL/SQL

In Oracle database administration, there are two ...READ MORE

Sep 25, 2019 in Database by gautham
 • 1,277 views
+1 vote
1 answer

How to migrate a PostgreSQL database into a SQLServer one?

Hello @kartik, The easier way to accomplish this. First ...READ MORE

May 13, 2020 in Database by Niroj
 • 82,880 points • 574 views
+1 vote
0 answers

What are the advantages of SQL? [closed]

Dec 28, 2019 in Database by Yuth
 • 130 points
closed Dec 30, 2019 by Kalgi • 831 views
+1 vote
1 answer

Do I need to mention primary key for each table?

Hi Pritha, First, there is no hard and ...READ MORE

Jul 4, 2019 in Database by sampriti
 • 1,120 points • 665 views
+1 vote
1 answer

How can I reset my auto_increment column in MYSQL?

Hi Pratim, I understand your issue. I think you ...READ MORE

Jul 2, 2019 in Database by sampriti
 • 1,120 points • 721 views
+1 vote
1 answer

What are the features of MySQL?

The features of MySQL are as follows: Ease ...READ MORE

Dec 12, 2018 in Database by DataKing99
 • 8,240 points • 5,359 views
+1 vote
1 answer

What are the data types in MySQL?

The Data Types of MySQL are as ...READ MORE

Dec 12, 2018 in Database by DataKing99
 • 8,240 points • 2,819 views
+1 vote
1 answer

What is the AND operator?

The AND operator is used to filter ...READ MORE

Dec 1, 2018 in Database by Sahiti
 • 6,370 points • 996 views
+1 vote
2 answers

List few commands of DDL, DML, and DCL.

The list of commands is as follows:  Data ...READ MORE

Nov 12, 2018 in Database by Sahiti
 • 6,370 points • 119,333 views
+1 vote
1 answer

Difference between cross join and natural join

The cross join produces the cross product ...READ MORE

Oct 12, 2018 in Database by DataKing99
 • 8,240 points • 16,041 views
+1 vote
1 answer

DELETE vs TRUNCATE vs DROP command

After the execution of ‘DELETE’ operation, COMMIT ...READ MORE

Aug 23, 2018 in Database by CodingByHeart77
 • 3,740 points • 1,797 views
+1 vote
1 answer

Cursor and Its Types

The cursor is a temporary work area ...READ MORE

Aug 9, 2018 in Database by CodingByHeart77
 • 3,740 points • 635 views
0 votes
0 answers

what kind of a nosql store is azure table storage

what kind of a nosql store is ...READ MORE

Dec 15, 2023 in Database by Priyanka
 • 700 points • 125 views
0 votes
0 answers

Create a SQL enter script from an Excel worksheet

I have a large excel worksheet that ...READ MORE

Sep 8, 2023 in Database by Satyawrat
 • 460 points • 283 views
0 votes
0 answers

Get json object values and store as arrays

[ ['david','female','john','e6a33eee180b07e563d74fee8c2c66b8',1,1,'roger63'], ...READ MORE

Nov 16, 2022 in Database by Ashwini
 • 5,430 points • 1,037 views
0 votes
0 answers

Can PHP arrays hold items of different type?

The definition of an array in other ...READ MORE

Nov 16, 2022 in Database by Ashwini
 • 5,430 points • 580 views
0 votes
1 answer

ERROR 1064 (42000): You have an error in your SQL syntax;

It is varchar and not var_char CREATE DATABASE IF NOT EXISTS ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 8,423 views
0 votes
1 answer

Delete all the records

You can use this if you have ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 596 views
0 votes
1 answer

How can I create a unique constraint on my column (SQL Server 2008 R2)?

The "indexes and keys" dialogue, not the ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 613 views
0 votes
1 answer

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
 • 63,420 points • 539 views
0 votes
1 answer

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
 • 63,420 points • 448 views
0 votes
1 answer

What is the difference between a primary key and a surrogate key?

The unique key in your database that ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 6,603 views
0 votes
1 answer

How do I obtain a Query Execution Plan in SQL Server?

There are several ways to get an ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 861 views
0 votes
1 answer

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
 • 63,420 points • 397 views
0 votes
1 answer

How do I do multiple CASE WHEN conditions using SQL Server 2008?

There are three formats of the case expression. ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 1,670 views
0 votes
1 answer

java.sql.SQLException: Column count doesn't match value count at row 1

I think PreparedStatement would be a better choice. I ...READ MORE

Sep 20, 2022 in Database by narikkadan
 • 63,420 points • 1,683 views
0 votes
1 answer

INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server

Your table dbo.Sup Item Cat refers to ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 7,328 views
0 votes
1 answer

Escape Character in SQL Server

You can escape quotation like this: select 'it''s ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 734 views
0 votes
1 answer

Function to Calculate Median in SQL Server

Use a simple-ish median calculation for a ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 1,001 views
0 votes
1 answer

Highest Salary in each department

SELECT DeptID, MAX(Salary) FROM EmpDetails GROUP BY ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 1,792 views
0 votes
1 answer

SQL Server: IF EXISTS ; ELSE

Try this: update b set code = ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 3,048 views
0 votes
1 answer

Best way to do nested case statement logic in SQL Server

Try some sort of COALESCE trick: SELECT COALESCE( ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 6,489 views
0 votes
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
 • 63,420 points • 476 views
0 votes
1 answer

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
 • 63,420 points • 429 views
0 votes
1 answer

How to find third or nᵗʰ maximum salary from salary table?

Use ROW_NUMBER(if you want a single) or DENSE_RANK(for all ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 718 views
0 votes
1 answer

How to check SQL Server version

Connect to the instance of SQL Server, ...READ MORE

Sep 19, 2022 in Database by narikkadan
 • 63,420 points • 476 views
0 votes
1 answer

Is there a combination of "LIKE" and "IN" in SQL?

There is no LIKE & IN combination ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 3,287 views
0 votes
1 answer

How to format datetime in SQL SERVER

In SQL Server 2012 and up you ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 582 views
0 votes
1 answer

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
 • 63,420 points • 454 views
0 votes
1 answer

How to find top three highest salary in emp table in oracle?

Use this: SELECT *FROM ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 7,141 views
0 votes
1 answer

Why do I need to configure the SQL dialect of a data source?

Dialect is defined as "a language's variety." ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 877 views
0 votes
1 answer

SQL like search string starts with

SELECT * from games WHERE (lower(title) LIKE ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 3,471 views
0 votes
1 answer

Not equal <> != operator on NULL

Standard SQL-92 is represented by >; its ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 538 views
0 votes
1 answer

Multiple SQL Joins error in W3Schools Tryit Editor

I'm ruining this query on w3school even ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 1,199 views
0 votes
1 answer

Oracle PL/SQL - ORA-01403 "No data found" when using "SELECT INTO"

Just populate the field directly, using ordering ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 4,195 views
0 votes
1 answer

SQL Server: Multiple table joins with a WHERE clause

It matters whether you place the filter ...READ MORE

Sep 18, 2022 in Database by narikkadan
 • 63,420 points • 585 views
0 votes
1 answer

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
 • 63,420 points • 483 views
0 votes
1 answer

org.hibernate.exception.SQLGrammarException: could not extract ResultSet

In the stacktrace, there is a line ...READ MORE

Sep 17, 2022 in Database by narikkadan
 • 63,420 points • 3,391 views
0 votes
1 answer

How to print SQL statement in codeigniter model

To display the query string: print_r($this->db->last_query()); ...READ MORE

Sep 17, 2022 in Database by narikkadan
 • 63,420 points • 3,212 views
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