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Found 4219 Articles for MySQLi
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
2K+ Views
For this, you can use group_concat(). Let us first create a table −mysql> create table DemoTable1507 -> ( -> Name varchar(20), -> PaperSet int -> ); Query OK, 0 rows affected (0.68 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1507 values('Chris', 111); Query OK, 1 row affected (0.37 sec) mysql> insert into DemoTable1507 values('David', 112); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1507 values('Mike', 111); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1507 values('Bob', 113); Query OK, 1 row affected (0.14 sec)Display all records from ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
270 Views
For this, you can use REPLACE(). Let us first create a table −mysql> create table DemoTable1506 -> ( -> Title text -> ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1506 values('This is MySQL'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1506 values('This is Java language'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1506 values('This is MongoDB NoSQL database'); Query OK, 1 row affected (0.60 sec)Display all records from the table using select statement −mysql> select * from DemoTable1506;This will ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
221 Views
For this, you can use CASE statement. Let us first create a table −mysql> create table DemoTable1505 -> ( -> Value integer unsigned, -> Status tinyint(1) -> ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1505 values(20, 0); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1505 values(45, 1); Query OK, 1 row affected (0.08 sec)Display all records from the table using select statement −mysql> select * from DemoTable1505;This will produce the following output −+-------+--------+ | Value | Status | +-------+--------+ | ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
192 Views
Let us first create a table table −mysql> create table DemoTable1504 -> ( -> Id int, -> FirstName varchar(20) -> ); Query OK, 0 rows affected (0.83 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1504 values(101, 'Chris'); Query OK, 1 row affected (0.63 sec) mysql> insert into DemoTable1504 values(102, 'Bob'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1504 values(103, 'David'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1504 values(104, 'Mike'); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
712 Views
Yes, we can pass NULL as in the below syntax −insert into yourTableName values(NULL, yourValue1, yourValue2, ...N);Let us first create a table −mysql> create table DemoTable1503 -> ( -> ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ClientName varchar(20), -> ClientAge int -> ); Query OK, 0 rows affected (0.45 sec)Insert some records in the table using insert command. Since we have set NOT NULL above, it won’t affect auto_increment −mysql> insert into DemoTable1503 values(NULL, 'Chris', 25); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1503 values(NULL, 'David', 28); Query OK, 1 row ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
103 Views
For this, you can use SUBSTRING_INDEX() along with ORDER BY. Let us first create a table −mysql> create table DemoTable1502 -> ( -> StudentId varchar(40) -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1502 values('John_120'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1502 values('John_201'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1502 values('Mike_178'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1502 values('Bob_198'); Query OK, 1 row affected (0.36 sec)Display all records from the table using select ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
2K+ Views
You need to use index to select multiple rows effectively. Let us first create a table −mysql> create table DemoTable1501 -> ( -> Id int NOT NULL PRIMARY KEY, -> URL text -> ); Query OK, 0 rows affected (0.62 sec)Here is the query to create index −mysql> create index id_index on DemoTable1501(Id); Query OK, 0 rows affected (0.23 sec) Records: 0 Duplicates: 0 Warnings: 0Insert some records in the table using insert command −mysql> insert into DemoTable1501 values(101, 'www.facebook.com'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1501 values(110, 'www.google.com'); Query OK, 1 ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
163 Views
For this, you can use GROUP BY along with ORDER BY clause. Let us first create a table −mysql> create table DemoTable1499 -> ( -> StudentName varchar(20), -> StudentMarks int -> ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1499 values('Chris', 56); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1499 values('David', 78); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1499 values('Bob', 98); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1499 values('Chris', 45); Query OK, 1 row ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
620 Views
To duplicate a MySQL database, the syntax is as follows −create table yourdatabaseName1.yourTableName1 select * from yourdatabaseName2.yourTableName2;Let us first create a table −mysql> use sample; Database changed mysql> create table DemoTable101 -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (1.45 sec)Insert some records in the table using insert command−mysql> insert into DemoTable101 values(101, 'Sam'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable101 values(102, 'Bob'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable101 values(103, 'David'); Query OK, 1 row affected (0.11 sec)Display all records ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
757 Views
To search a column value with %, the syntax is as follows −select * from yourTableName where yourColumnName LIKE '\%%';Let us first create a table −mysql> create table DemoTable1497 -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert −mysql> insert into DemoTable1497 values('%JohnSmith'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1497 values('DavidMiller'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1497 values('CarolTaylor%'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1497 values('%DavidMiller'); Query OK, 1 row affected (0.12 ... Read More