The difference between MySQL BigInt and int is that INT is a 32-bit long while BIGINT is 64-bit long.The following are some of the points −The BigInt takes 8 bytes of storage while int takes 4 bytes of storage.The int takes 4294967295 maximum values for int(10), whereas 18, 446, 744, 073, 709, 551, 615 for the bigint(20).The BigInt(20) and int(10), in this 20 and 10 can be used for width display with zerofill.Here is the demo of Bigint and int with zerofill. The following is the query to create a table.mysql> create table BigintandintDemo −> ( ... Read More

To make MySQL’s NOW() and CURDATE() functions use UTC, you need to write my.cnf file. Write the below instruction in my.cnf −[mysqld_safe] timezone = UTCFirstly, reach the directory with the help of the following query −mysql> select @@datadir;The following is the output −+---------------------------------------------+ | @@datadir | +---------------------------------------------+ | C:\ProgramData\MySQL\MySQL Server 8.0\Data\ | +---------------------------------------------+ 1 row in set (0.00 sec)Now reach the directory for which the link ... Read More

You can count multiple COUNT() for multiple conditions in a single query using GROUP BY.The syntax is as follows -SELECT yourColumnName, COUNT(*) from yourTableName group by yourColumnName;To understand the above syntax, let us first create a table. The query to create a table is as follows.mysql> create table MultipleCountDemo -> ( -> Id int, -> Name varchar(100), -> Age int -> ); Query OK, 0 rows affected (2.17 sec)Insert records in the table using insert command. The query is as follows.mysql> insert into MultipleCountDemo values(1, 'Carol', 21); Query OK, 1 row affected (0.27 sec) mysql> insert into MultipleCountDemo values(2, ... Read More

In MySQL, now() can be used to insert current date/time. The syntax is as follows −insert into yourTableName values(now());To understand the above concept of inserting current date/time in the table, let us first create a table −mysql> create table CurrentDateTimeDemo −> ( −> YourTime datetime −> ); Query OK, 0 rows affected (0.58 sec)Inserting current date/time using now(). The query is as follows −mysql> insert into CurrentDateTimeDemo values(now()); Query OK, 1 row affected (0.20 sec)Now you can check the current date/time has been inserted or not −mysql> select *from CurrentDateTimeDemo;The following ... Read More

You can use WHERE clause and OR operator to show table with multiple LIKE. The syntax is as follows:show table from yourDatabaseName where tables_in_yourDatabaseName Like ‘%anyTableName%’ or tables_in_yourDatabaseName Like ‘%anyTableName2%’ or tables_in_yourDatabaseName Like ‘%anyTableName3%’ . . . . or tables_in_yourDatabaseName Like ‘%anyTableNameN%’In the above syntax, only the table name in the database is displayed.Here the database ‘test’ and the tables in the same database is considered. The query to show tables with multiple LIKE is as follows -mysql> show tables from test -> where tables_in_test like '%userrole%' -> or tables_in_test like '%view_student%' -> or tables_in_test like '%wholewordmatchdemo%';The following is the ... Read More

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