Tag: MySQL | MySQL Tutorial from Beginners to Intermediate | MySQL Interview Question

myTop – mySQL – Database – Performance Monitoring Tool

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mysql-tutorials

myTop is one of free open source code to monitor mySQL Database in CUI mode. The terminal window show the statistics information about threads queries, uptime and more etc.., The tool helps to optimize and improve performance of mySQL to handle large request and response in the database server. How to install myTOP in Ubuntu ? sudo apt install mytop Configuring myTOP sudo nano /root/.mytop Copy and paste the default settings. host=localhost db=mysql delay=3 port=3306 socket= batchmode=0 color=1 idle=0 Connecting to myTOP :- sudo mytop -u <<USERNAME> –prompt Sample myTOP…

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How to get last one hour data in MySQL ?

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Last one Hour data in MySQL ? Example :- select o.code, o.customerId, c.name, c.email from `Order` o’; join Customer c on c.id = o.customerId ‘; where o.orderDate >= DATE_SUB(NOW(),INTERVAL <<SYNTAX>> HOUR) order by o.id limit 0, 2 Example :- select o.code, o.customerId, c.name, c.email from `Order` o’; join Customer c on c.id = o.customerId ‘; where o.orderDate >= DATE_SUB(NOW(),INTERVAL 1 HOUR) order by o.id limit 0, 2

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How to import table from other database in MySQL

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Import a record from other Database How to import a record from another database table in mysql ? Same Table Structure in Source and Destination Table INSERT INTO <TABLENAME> SELECT * FROM <DESTINATION DATABASENAME>.<TABLENAME> Transfer from Limited Fields INSERT INTO <TABLENAME> (col1, col2) SELECT (col1, col2) FROM <DESTINATION DATABASENAME>.<TABLENAME> Transfer from Limited Fields with Condition INSERT INTO <TABLENAME> (col1, col2) SELECT (col1, col2) FROM <DESTINATION DATABASENAME>.<TABLENAME> where condition.field = condition.value

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How to import CSV file into Table in MySQL ?

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Import CSV File into MySQL Table This below example shows you how to use the LOAD DATA INFILE statement to import CSV file into MySQL table. The LOAD DATA INFILE statement allows you to read data from a text file and import the file’s data into a database table very fast. Before importing the file, you need to complete the following steps : 1) Data Import table should be created 2) CSV Columns Should be match with the Database Table. 3) Access required to execute the query LOAD DATA INFILE…

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Insert a row no in new column in MySQL

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Add a row no. in new column Update a column with record row no in MySQL Execute the below query in Mysql to update an row no. in the specified column   My Sql Query Example  SET @pos := 0 UPDATE userinfo SET fuserid = ( SELECT @pos := @pos + 1 ) ORDER BY updated_at DESC @pos -> Variable Name userinfo -> Table Name fuserid -> Column Name

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