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Found 4219 Articles for MySQLi
![Smita Kapse](https://www.tutorialspoint.com/assets/profiles/13597/profile/60_103706-1512718957.jpg)
4K+ Views
To insert current date to the database, you can use NOW(). Following is the syntax −INSERT INTO yourTableName(yourDateColumnName) VALUES(NOW());If your column has datatype date then NOW() function inserts only current date, not time and MySQL will give a warning. To remove the warning, you can use CURDATE().Let us first create a table −mysql> create table insertcurrentdate -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> currentDate date -> ); Query OK, 0 rows affected (1.09 sec)Following is the query to insert some records in the table using insert command. We have used both NOW() ... Read More
![Anvi Jain](https://www.tutorialspoint.com/assets/profiles/13591/profile/60_98631-1512716973.jpg)
588 Views
To format MySQL time with lowercase am/pm, use the LOWER() as well as DATE_FORMAT().Let us first create a table −mysql> create table formatTime -> ( -> LoginTime time -> ); Query OK, 0 rows affected (0.56 sec)Following is the query to insert records in the table using insert command −mysql> insert into formatTime values('12:40:34'); Query OK, 1 row affected (0.20 sec) mysql> insert into formatTime values('14:10:58'); Query OK, 1 row affected (0.13 sec) mysql> insert into formatTime values('16:56:40'); Query OK, 1 row affected (0.18 sec) mysql> insert into formatTime values('10:12:14'); Query OK, 1 row ... Read More
![Nishtha Thakur](https://www.tutorialspoint.com/assets/profiles/13598/profile/60_104893-1512719058.jpg)
306 Views
Use DATE_ADD() to add 10 minutes to datetime format. Following is the syntax −select date_add(yourColumnName ,interval 10 minute) from yourTableName;Let us first create a table −mysql> create table add10MinuteDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> DelayDatetime datetime -> ); Query OK, 0 rows affected (0.83 sec)Following is the query to insert records in the table using insert command −mysql> insert into add10MinuteDemo(DelayDatetime) values('2019-01-23 12:45:56'); Query OK, 1 row affected (0.16 sec) mysql> insert into add10MinuteDemo(DelayDatetime) values('2019-03-25 10:30:23'); Query OK, 1 row affected (0.19 sec) mysql> insert into add10MinuteDemo(DelayDatetime) values('2019-04-21 04:04:30'); Query ... Read More
![Smita Kapse](https://www.tutorialspoint.com/assets/profiles/13597/profile/60_103706-1512718957.jpg)
914 Views
Yes, you can use group_concat() for this. Let us first create a table −mysql> create table groupByOneSelectAll -> ( -> StudentDetails varchar(100), -> StudentName varchar(100) -> ); Query OK, 0 rows affected (0.91 sec)Following is the query to insert some records in the table using insert command −mysql> insert into groupByOneSelectAll values('StudentFirstName', 'John'); Query OK, 1 row affected (0.14 sec) mysql> insert into groupByOneSelectAll values('StudentFirstName', 'Chris'); Query OK, 1 row affected (0.21 sec) mysql> insert into groupByOneSelectAll values('StudentFirstName', 'Robert'); Query OK, 1 row affected (0.65 sec) mysql> insert into groupByOneSelectAll values('StudentFirstName', 'Bob'); Query ... Read More
![Anvi Jain](https://www.tutorialspoint.com/assets/profiles/13591/profile/60_98631-1512716973.jpg)
272 Views
The CAST() function in MySQL converts a value of any type into a value that has a specified type. Let us first create a table −mysql> create table castFunctionDemo -> ( -> ShippingDate date -> ); Query OK, 0 rows affected (0.74 sec)Following is the query to insert some records in the table using insert command −mysql> insert into castFunctionDemo values('2019-01-31'); Query OK, 1 row affected (0.20 sec) mysql> insert into castFunctionDemo values('2018-07-12'); Query OK, 1 row affected (0.16 sec) mysql> insert into castFunctionDemo values('2016-12-06'); Query OK, 1 row affected (0.16 sec) mysql> insert ... Read More
![Nishtha Thakur](https://www.tutorialspoint.com/assets/profiles/13598/profile/60_104893-1512719058.jpg)
3K+ Views
To compare timestamps in MySQL, you can use DATE(). Let us first create a table−mysql> create table comparingTimestampDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> AdmissionDate timestamp -> ); Query OK, 0 rows affected (0.54 sec)Following is the query to insert records in the table using insert command −mysql> insert into comparingTimestampDemo(AdmissionDate) values('2019-03-31'); Query OK, 1 row affected (0.13 sec) mysql> insert into comparingTimestampDemo(AdmissionDate) values('2019-04-10'); Query OK, 1 row affected (0.12 sec) mysql> insert into comparingTimestampDemo(AdmissionDate) values('2019-04-15'); Query OK, 1 row affected (0.17 sec) mysql> insert into comparingTimestampDemo(AdmissionDate) values('2019-03-29'); Query OK, 1 ... Read More
![Smita Kapse](https://www.tutorialspoint.com/assets/profiles/13597/profile/60_103706-1512718957.jpg)
322 Views
To select only duplicate records from database and display the count, use HAVING along with aggregate function count(). Let us first create a table −mysql> create table duplicateRecords -> ( -> ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ClientName varchar(20) -> ); Query OK, 0 rows affected (0.49 sec)Following is the query to insert records in the table using insert command −mysql> insert into duplicateRecords(ClientName) values('John'); Query OK, 1 row affected (0.16 sec) mysql> insert into duplicateRecords(ClientName) values('Carol'); Query OK, 1 row affected (0.17 sec) mysql> insert into duplicateRecords(ClientName) values('John'); Query OK, 1 row affected ... Read More
![Anvi Jain](https://www.tutorialspoint.com/assets/profiles/13591/profile/60_98631-1512716973.jpg)
1K+ Views
To calculate a value from multiple columns, use GROUP BY. Following is the syntax −select yourColumnName1, sum(yourColumnName2*yourColumnName3) AS anyAliasName from yourTableName group by yourColumnName1;Let us first create a table −mysql> create table calculateValueDemo -> ( -> Id int, -> ProductPrice int, -> ProductWeight int -> ); Query OK, 0 rows affected (0.56 sec)Following is the query to insert records in the table using insert command −mysql> insert into calculateValueDemo values(100, 35, 5); Query OK, 1 row affected (0.16 sec) mysql> insert into calculateValueDemo values(101, 50, 3); Query OK, 1 row affected (0.16 sec) ... Read More
![Nishtha Thakur](https://www.tutorialspoint.com/assets/profiles/13598/profile/60_104893-1512719058.jpg)
1K+ Views
To select distinct value from one column only, you can use aggregate function MAX() along with GROUP BY. Let us first create a table −mysql> create table distinctFromOneColumn -> ( -> StudentId int, -> StudentName varchar(100) -> ); Query OK, 0 rows affected (0.77 sec)Following is the query to insert records in the table using insert command −mysql> insert into distinctFromOneColumn values(1001, 'John'); Query OK, 1 row affected (0.15 sec) mysql> insert into distinctFromOneColumn values(1002, 'Carol'); Query OK, 1 row affected (0.15 sec) mysql> insert into distinctFromOneColumn values(1001, 'Sam'); Query OK, 1 row affected ... Read More
![Smita Kapse](https://www.tutorialspoint.com/assets/profiles/13597/profile/60_103706-1512718957.jpg)
6K+ Views
This error occurs if let’s say you used var_char instead of varchar type. To remove this type of error, use, for example, varchar(100) instead of var_char(100).Let us now see how this error occurs −mysql> create table removeErrorDemo -> ( -> StudentId int, -> StudentName var_char(50) -> );The following is the output displaying the error −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 near 'var_char(50) )' at line 4Now let us remove the error. Here is the query ... Read More