To update values incrementally in MySQL, you need to create a variable with the help of SET command. The syntax to create a variable is as follows −set @anyVariableName := 0;To update value, you need to use UPDATE command. Let us begin with creating a table. The query to create a table −mysql> create table UpdateValueIncrementally −> ( −> ProductId int −> ); Query OK, 0 rows affected (0.90 sec)Insert records in the table with the help of select statement. The query is as follows −mysql> insert into UpdateValueIncrementally values(10); Query ... Read More

Parse date in MySQL with the help of STR_TO_DATE() function. The syntax is as follows −select str_to_date(yourColumName, ’format’) as anyVariableName from yourTableName;The format in the above syntax is '%d-%b-%y'.Now to understand the above function, let us create a table. The following is the query to create a table −mysql> create table ParseDateDemo −> ( −> yourDate varchar(200) −> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table with the help of select statement. The query is as follows −mysql> insert into ParseDateDemo values('10-Nov-18'); Query OK, 1 row ... Read More

To set max_connections in MySQL programmatically, you can use SET command. The syntax is as follows −SET GLOBAL max_connections=yourIntegerValue;Let us implement the above query to set maximum connections. The query is as follows −mysql> set global max_connections=1000; Query OK, 0 rows affected (0.04 sec)Check maximum connections are set or not, using the show variables command. The query is as follows.mysql> show variables like 'max_connections';The following is the output.+-----------------+-------+ | Variable_name   | Value | +-----------------+-------+ | max_connections | 1000  | +-----------------+-------+ 1 row in set (0.18 sec)

To get the nth record from MySQL query, you can use LIMIT. The syntax is as follows −select *from yourTableName order by yourColumnName limit n, 1;To understand the above syntax, let us create a table. The following is the query to create a table −mysql> create table NthRecordDemo −> ( −> Id int, −> Name varchar(200) −> ); Query OK, 0 rows affected (0.92 sec)Insert some records in the table using the following query −mysql> insert into NthRecordDemo values(100, 'John'); Query OK, 1 row affected (0.09 sec) ... Read More

You can query between dates with the help of BETWEEN statement. The syntax is as follows −select *from yourTableName where yourColumnName between ‘yourStartingDate’ and curdate().Use curdate() or now(), both these functions will work. To understand the above syntax, let us create a table −mysql> create table BetweenDateDemo −> ( −> StartDate datetime −> ); Query OK, 0 rows affected (0.78 sec)Insert some records in the table with the help of the following query −mysql> insert into BetweenDateDemo values(date_add(now(), interval -1 year)); Query OK, 1 row affected (0.11 sec) mysql> insert ... Read More

To concat a string, use the CONCAT() function from MySQL as shown in the below syntaxSELECT CONCAT(yourColumnName1, ’anyConcatenationString’), CONCAT(yourColumnName2, ’anyC oncatenationString’), ....N from yourTableName;To understand the above syntax, let us first create a table. The query to create a table is as followsmysql> create table selectConcat -> ( -> StudentId int, -> StudentName varchar(100), -> StudentAge int -> ); Query OK, 0 rows affected (1.32 sec)Insert some records in the table using insert command. The query is as followsmysql> insert into selectConcat values(1, 'Carol', 23); Query OK, 1 row affected (0.19 sec) mysql> insert into selectConcat values(2, 'John', 24); ... Read More

You can order by length of characters with the help of CHAR_LENGTH() function from MySQL. The function returns the number of characters i.e. 4 for the following string −AMITTo order strings by length of characters, the following is the syntax −select *from yourTableName order by CHAR_LENGTH(yourColumnName);To understand the above concept, let us first create a table. The following is the query to create a table −mysql> create table OrderByCharacterLength    −> (    −> BookName varchar(200)    −> ); Query OK, 0 rows affected (1.97 sec)Insert some records in the table with the help of insert command. The query is ... Read More

The str_replace version in MySQL is the replace() function. Let us first create a table to understand the function −mysql> create table StringReplaceDemo −> ( −> Id int, −> URL varchar(200) −> ); Query OK, 0 rows affected (0.38 sec)Insert some records in the table with the help of insert command. The query is as follows −mysql> insert into StringReplaceDemo values(1001, 'https://www.google.co.in'); Query OK, 1 row affected (0.09 sec) mysql> insert into StringReplaceDemo values(1002, 'https://www.facebook.com'); Query OK, 1 row affected (0.11 sec) mysql> insert into StringReplaceDemo ... Read More

Using the CONCAT() function, we can work with user variables in LIKE clause. The syntax is as follows.set @anyVariableName='anyValue'; select yourColumnName1, yourColumnName2, yourColumnName3, ...N from yourTableName whereyourColumnName like CONCAT('%', @anyVariableName, '%');To understand the above syntax, let us first create a table. The query to create a table is as follows.mysql> create table UserVariableInLike -> ( -> id int, -> Name varchar(100), -> Age int -> ); Query OK, 0 rows affected (0.83 sec)Insert records in the table using insert command. The query is as follows.mysql> insert into UserVariableInLike values(101, 'John', 23); Query OK, 1 row affected (0.23 sec) mysql> ... Read More

To fix the error, you just need to replace TYPE with ENGINE. The syntax to set the engine is as follows −ENGINE = MyISAM;The MySQL error occurs when TYPE is used. Let us see the same scenario while creating a table −mysql> create table Customers −> ( −> CustomerId int, −> CustomerName varchar(200) −> )TYPE = MyISAM;The error is as follows −ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use ... Read More