AmitDiwan has Published 11365 Articles

Copy column values from one table into another matching IDs in MySQL

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:46:51

881 Views

Let us first create a table −mysql> create table DemoTable1 (    PersonId int,    Value int ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(100, 78); Query OK, 1 row affected (0.46 sec) mysql> insert into DemoTable1 ... Read More

MySQL CONCAT a specific column value with the corresponding record

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:43:56

83 Views

Let us first create a table −mysql> create table DemoTable (    FirstName varchar(100),    CountryName varchar(100) ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Adam', 'US'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable ... Read More

INSERT INTO table if a table exists in MySQL else implement CREATE TABLE and create the table

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:41:48

901 Views

Here’s the syntax to check whether the table already exists using the CREATE TABLE IF NOT EXISTS −create table if not exists yourTableName (    yourColumnName1 dataType,    .    .    .    .    N ); insert into yourTableName values(yourValue1, .......N);Let us first create a table −mysql> create ... Read More

How to find a specific record from a list of values with semicolon in MySQL?

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:38:20

94 Views

For this, you can use FIND_IN_SET(). Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Value varchar(100) ); Query OK, 0 rows affected (2.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Value) values('100;200;300'); Query ... Read More

MySQL query to order timestamp in descending order but place the timestamp 0000-00-00 00:00:00 first?

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:36:06

1K+ Views

Let us first create a table &mnus;mysql> create table DemoTable (    `timestamp` timestamp ); Query OK, 0 rows affected (1.12 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(now()); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values('00:00:00'); Query OK, 1 ... Read More

MySQL group_concat to add a separator for empty fields?

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:33:08

339 Views

For this, you can use replace() along with group_concat(). Here, for empty fields, we are displaying a comma as a separator. Let us first create a table −mysql> create table DemoTable (    Id int,    Number varchar(100) ); Query OK, 0 rows affected (2.03 sec)Insert some records in the ... Read More

How to ORDER BY DESC and display the first 3 records in MySQL?

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:29:43

485 Views

For this, you can use ORDER BY DESC with LIMIT. Let us first create a table −mysql> create table DemoTable (    UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    UserName varchar(100) ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert ... Read More

MySQL ORDER BY strings with underscore?

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:27:27

230 Views

Let us first create a table −mysql> create table DemoTable (    Name varchar(100) ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John_Smith'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('Chris Brown'); Query OK, ... Read More

HTML onresize Event Attribute

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:26:46

75 Views

The HTML onresize attribute is triggered when user resize the browser window.SyntaxFollowing is the syntax −Let us see an example of HTML onresize event Attribute −Example Live Demo    body {       color: #000;       height: 100vh;       background: linear-gradient(62deg, #FBAB7E 0%, ... Read More

Insert multiple rows from another table but the inserted records should be distinct

AmitDiwan

AmitDiwan

Updated on 26-Sep-2019 07:24:07

212 Views

For this, you can use DISTINCT along with the INSERT INTO SELECT statement. Let us first create a table −mysql> create table DemoTable1 (    Value int ); Query OK, 0 rows affected (1.03 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(50); Query OK, ... Read More

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