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MySQL Articles
Page 329 of 355
Getting last 5 character of a string with MySQL query?
To get the first n characters of string with MySQL, use LEFT(). To get the last n char of string, the RIGHT() method is used in MySQL.The syntax for RIGHT() method is as follows −SELECT RIGHT(yourColumnName, valueOfN) as anyVariableName from yourTableName;To understand the above concept, let us create a table. The query to create a table is as follows −mysql> create table gettingLast5Characters −> ( −> BookName varchar(100) −> ); Query OK, 0 rows affected (0.73 sec)Now you can insert records in the table using insert command. The query is as follows −mysql> insert into gettingLast5Characters values('Introduction ...
Read MoreWhat should I do? Select int as currency or convert int to currency format in MySql?
To convert int to current format, use CONCAT() with FORMAT() function from MySQL.The syntax is as follows −SELECT CONCAT(‘CurrencySymbol’, FORMAT(yourColumnName, valueAfterDecimal)) as AnyVariableName from yourTableName;To understand the above syntax, let us create a table. The query to create a table −mysql> create table AddingCurrencySymbolDemo −> ( −> Amount int −> ); Query OK, 0 rows affected (1.50 sec)Insert records in the table using insert command. The query is as follows −mysql> insert into AddingCurrencySymbolDemo values(250); Query OK, 1 row affected (0.22 sec) mysql> insert into AddingCurrencySymbolDemo values(500); Query OK, 1 ...
Read MoreCan we update MySQL with if condition?
You can update MySQL with IF condition as well as CASE statement. For this purpose, let us first create a table. The query to create a table −mysql> create table UpdateWithIfCondition −> ( −> BookId int, −> BookName varchar(200) −> ); Query OK, 0 rows affected (0.60 sec)Now you can insert records in the table using insert command. The query is as follows −mysql> insert into UpdateWithIfCondition values(1000, 'C in Depth'); Query OK, 1 row affected (0.12 sec) mysql> insert into UpdateWithIfCondition values(1001, 'Introduction to Java'); Query OK, 1 row affected (0.14 sec)Display all records ...
Read MoreHow to display the value of a variable on command line in MySQL?
To display the value of a variable, you can use select statement. The syntax is follows −SELECT @yourVariableName;Let us first create a variable. This can be done using SET command. The following is the syntax to create a variable −SET @yourVariableName = yourValue;Let us check the above syntax to create a variable and display the value of created variable.The following is the query to create a variable −mysql> set @FirstName = 'Bob'; Query OK, 0 rows affected (0.04 sec)Now you can display the value of a variable using select statement. The query is as follows −mysql> select @FirstName;The following is ...
Read MoreMySQL query to extract first word from a field?
To extract first word from a field, use in-built SUBSTRING_INDEX() function. The syntax is as follows −SELECT SUBSTRING_INDEX(yourColumnName, ’ ‘, 1) as anyVariableName from yourTableName;In the above query, if you use -1 in place of 1 then you will get the last word. To understand the above concept, let us create a table. The following is the query to create a table.mysql> create table FirstWordDemo −> ( −> AllWords longtext −> ); Query OK, 0 rows affected (0.83 sec)Now insert some words in the table using insert command. The query is ...
Read MoreHow to get the Average on MySQL time column?
To get average on time column, use the below syntax. It will give the average in time format −SELECT SEC_TO_TIME(AVG(TIME_TO_SEC(yourColumnName))) as anyVariableName from yourTableName;To understand the above concept, let us create a table. The following is the query −mysql> create table AverageOnTime −> ( −> PunchInTime time −> ); Query OK, 0 rows affected (0.61 sec)Insert time values in the table using insert command. The query to insert records is as follows −mysql> insert into AverageOnTime values('00:00:40'); Query OK, 1 row affected (0.20 sec) mysql> insert into AverageOnTime values('00:02:50'); Query OK, 1 row affected (0.15 sec) ...
Read MoreDecrease a row value by 1 in MySQL?
You can increase and decrease row value by 1 in MySQL using UPDATE command. The syntax is as follows −UPDATE yourTableName set yourColumnName = yourColumnName-1 where condition;Let us create a table to decrease row value by 1. The following is the query −mysql> create table IncrementAndDecrementValue −> ( −> UserId int, −> UserScores int −> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into IncrementAndDecrementValue values(101, 20000); Query OK, 1 row affected (0.13 sec) mysql> insert into IncrementAndDecrementValue values(102, 30000); ...
Read MoreIncrease and decrease row value by 1 in MySQL with Stored Procedure?
Let us first create a table to increase and adecrease row value by 1. The following is the query −mysql> create table IncrementAndDecrementValue −> ( −> UserId int, −> UserScores int −> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into IncrementAndDecrementValue values(101, 20000); Query OK, 1 row affected (0.13 sec) mysql> insert into IncrementAndDecrementValue values(102, 30000); Query OK, 1 row affected (0.20 sec) mysql> insert into IncrementAndDecrementValue values(103, 40000); Query OK, 1 row affected (0.11 sec)Display all records ...
Read MoreMySQL difference between two timestamps in Seconds?
You can use in-built function UNIX_TIMESTAMP() from MySQL to get the timestamps and the difference between two timestamps. The syntax is as follows −SELECT UNIX_TIMESTAMP(yourColumnName1) - UNIX_TIMESTAMP(yourColumnName2) as anyVariableName from yourTableName;To understand the above concept, let us create a table. The following is the query to create a table −mysql> create table DifferenceInSeconds −> ( −> FirstTimestamp TIMESTAMP, −> SecondTimestamp TIMESTAMP −> ); Query OK, 0 rows affected (0.93 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into DifferenceInSeconds values('2012-12-12 ...
Read MoreCombine date and time column into a timestamp in MySQL?
To combine date and time column into a timestamp, you can use cast() function with concat().The syntax is as follows −select cast(concat(yourDateColumnName, ' ', yourTimeColumnName) as datetime) as anyVariableName from yourTableName;In the above concept, you will use cast() when your date and time is in string format. The cast() function can be used only for datetime. To understand the above syntax, let us create a table.The query to create a table is as follows −mysql> create table DateAndTimeToTimestamp −> ( −> Duedate date, −> DueTime time −> ); ...
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