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AmitDiwan has Published 11365 Articles
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AmitDiwan
70 Views
Use nested insert with select in MySQL for this as shown in the below syntax −insert into yourTableName2(yourColumnName1, yourColumnName2, .....N) select yourColumnName1, yourColumnName2, ....N from yourTableName1 where yourCondition;Let us first see an example and create a table −mysql> create table DemoTable1 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, ... Read More
What happens when you insert nothing after declaring a column “timestamp default CURRENT_TIMESTAMP”?
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AmitDiwan
104 Views
In this case, the current timestamp gets inserted into the table column. Let us first create a table −mysql> create table DemoTable ( ArrivalDate timestamp default CURRENT_TIMESTAMP ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(now()); Query ... Read More
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AmitDiwan
379 Views
You can use the conv() function along with the cast() to cast from hexadecimal to a decimal value.Note − MD5 is in hexadecimalLet us first create a table −mysql> create table DemoTable ( Password text ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using ... Read More
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AmitDiwan
284 Views
You can try to get a column’s maximum value using two ways. The first way is as follows −select max(yourColumnName) from yourTableName;The second way is as follows −select yourColumnName from yourTableName order by yourColumnName DESC LIMIT 1;NOTE − The first query takes less time than the second query because the ... Read More
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AmitDiwan
116 Views
Let us first create a table −mysql> create table DemoTable ( AdmissionDate timestamp ); Query OK, 0 rows affected (0.90 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2007-01-10'); Query OK, 1 row affected (0.34 sec) mysql> insert into DemoTable values('2015-07-12'); Query OK, 1 ... Read More
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AmitDiwan
269 Views
For this, use the LENGTH() function from MySQL. Let us first create a table. We have declared the type of column as BLOB −mysql> create table DemoTable ( Title blob ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into ... Read More
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AmitDiwan
87 Views
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Number1 int, Number2 int ); Query OK, 0 rows affected (0.68 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Number1, Number2) values(10, 30); Query OK, ... Read More
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AmitDiwan
65 Views
For this, you can use LIKE operator along with AND. Let us first create a table −mysql> create table DemoTable ( EmployeeFirstName varchar(50), EmployeeLastName varchar(50) ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 'Smith'); Query ... Read More
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AmitDiwan
6K+ Views
Yes, we can do that. Let us first create a table −mysql> create table DemoTable ( Name varchar(50) ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.14 sec) mysql> insert into ... Read More
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AmitDiwan
443 Views
For this, use RAND() for random records and LIMIT 1 to get only a single value. However, use the WHERE clause to select that particular ‘Name’, which is repeating.Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(20) ... Read More