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Updating a MySQL table with values from another table?

George John
Answered 22h 11m ago

We can update another table with the help of inner join. Let us create two tables. Creating a table mysql> CREATE table tblFirst -> ( -> id int, -> name varchar(100) -> ); Query OK, 0 rows ... Read More

What is ROW_NUMBER() in MySQL?

Ankith Reddy
Answered 22h 13m ago

Row_NUMBER() included from MySQL version 8.0. It is a type of window function. This can be used to assign a sequence number for rows. To understand, create a table with the help of CREATE pcommand − Creating a table mysql> CREATE table rowNumberDemo -> ( ... Read More

Simplest way to copy data from one table to another new table in MySQL?

Maheshwari Thakur
Answered 22h 15m ago

To copy data from one table to another table, firstly we will create a table. Creating first table − mysql> CREATE table FirstTable -> ( -> id int, -> name varchar(100) -> ); Query OK, 0 rows ... Read More

How to clone a MySQL table, indexes, and data?

Chandu yadav
Answered 22h 18m ago

To clone a MySQL table, indexes and data, we can use “LIKE”. I have a database ‘business’ and in that many tables have been created. Here we can check all the tables. mysql> USE business; Database changed Let us display all the tables − mysql> SHOW tables; ... Read More

Pagination using MySQL LIMIT, OFFSET?

George John
Answered 22h 20m ago

Firstly, we need to create a table with some records, then we will use pagination with the help of limit and offset. Creating a table with the help of CREATE command. The query is as follows − mysql> CREATE table limitoffsetDemo -> ( ... Read More

Advantages of using MySQLi over MySQL?

Ankith Reddy
Answered 22h 22m ago

MySQLi is also known as MySQL improved Extension. It is a relational SQL database management system. It is often used inside PHP to provide an interface with the MySQL databases. Some of the reasons why MySQLi is famous are given below − MySQLi uses the standard form of the ... Read More

Find and Replace text in the entire table using a MySQL?

Maheshwari Thakur
Answered 22h 25m ago

The text can be found and replaced with the help of the replace() function. It is explained with the help of the following steps − First, a table is created with the help of the create command which is given as follows − mysql> CREATE table FindAndReplaceDemo ... Read More

How do I create and use a sequence in MySQL?

Chandu yadav
Answered 22h 30m ago

To create a sequence in MySQL, auto_increment can be used on the column. It starts from the value 1 and increments by 1 for each record when it is inserted. First, a table is created with the help of CREATE table. The query for that is as follows − ... Read More

How to display all the tables in MySQL with a storage engine?

Ankith Reddy
Answered on 18th Oct, 2018

We can display all the tables with the help of the WHERE clause. The syntax for that is as follows − SELECT table_name FROM INFORMATION_SCHEMA.TABLES WHERE engine = 'InnoDB'; Now, the above syntax is applied to the given query − mysql> SELECT * from INFORMATION_SCHEMA.TABLES WHERE engine ... Read More

Find and display duplicate records in MySQL?

Maheshwari Thakur
Answered on 18th Oct, 2018

First, a table is created with the help of the CREATE command. This is given as follows − mysql> CREATE table DuplicateFound -> ( -> ID int, -> Name varchar(100), -> Location varchar(200) -> ... Read More

How to remove leading and trailing whitespace in a MySQL field?

George John
Answered on 18th Oct, 2018

To remove leading and trailing space, we can use the trim() in MySQL. Firstly, we will create a table with the help of CREATE command. Creating a table − mysql> CREATE table TrailingANdLeadingDemo -> ( -> SpaceTrailLead varchar(100) -> ); ... Read More

How to use Straight Join in MySQL?

Maheshwari Thakur
Answered on 18th Oct, 2018

The straight join in MySQL works like inner join or join. This means that it returns only the matching rows. Firstly, we need to understand Straight join in MySQL. For that, we need to create two tables and relate both the tables with foreign key constraints. Here is the first ... Read More

How to measure actual MySQL query time?

Ankith Reddy
Answered on 18th Oct, 2018

To measure actual MySQL query time, we can use the concept of profiling that must be set to 1 before executing the query. The order must be like this. Set profiling to 1 Then execute query Then show profiles Now, I am applying the above order to get ... Read More

How to save time in milliseconds in MySQL?

Chandu yadav
Answered on 18th Oct, 2018

To save time in milliseconds, we can use now(3) function because “milli 3” can be used for te same purpose. Firstly, I will create a table with the help of CREATE command − mysql> CREATE table MilliSecondDemo -> ( -> MyTimeInMillSec datetime(3) ... Read More

How to select a column name with spaces in MySQL?

Ankith Reddy
Answered on 18th Oct, 2018

To select a column name with spaces, use the back tick symbol with column name. The symbol is ( ` `). Back tick is displayed in the keyboard below the tilde operator ( ~). Firstly, create a table − mysql> CREATE table SpaceColumn -> ( ... Read More

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