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What happens when you insert nothing after declaring a column “timestamp default CURRENT_TIMESTAMP”?
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 OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------------------+ | ArrivalDate | +---------------------+ | 2019-09-01 14:08:47 | | 2019-09-01 14:08:50 | +---------------------+ 2 rows in set (0.00 sec)
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 insert command −mysql> insert into DemoTable values("a5391e96f8d48a62e8c85381df108e98"); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values("ea7a32d2dc5bb793af262dcb6ea1a54d"); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------------------------------+ | Password ... Read More
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 second query first sort n number of values then gives the highest value using LIMIT 1. Therefore, use the first query.Let us first create a table −mysql> create table DemoTable ( Number int ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command ... Read More
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 row affected (0.18 sec) mysql> insert into DemoTable values('2017-11-01'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('2019-08-29'); Query OK, 1 row affected (0.08 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------------------+ | AdmissionDate ... Read More
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 DemoTable values('This is a MySQL tutorial'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Java is an object oriented programming language'); Query OK, 1 row affected (0.61 sec) mysql> insert into DemoTable values('C is a procedural language'); Query OK, 1 row affected (0.20 sec)Display all records from ... Read More
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, 1 row affected (0.09 sec) mysql> insert into DemoTable(Number1, Number2) values(60, 50); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(Number1, Number2) values(110, 100); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ... Read More
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 OK, 1 row affected (0.61 sec) mysql> insert into DemoTable values('David', 'Miller'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('Adam', 'Smith'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('Carol', ... Read More
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 DemoTable values('Adam'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Bob'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('Mike'); Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ... Read More
The yield keyword is used in JavaScript to pause and resume a generator function. The value of the expression is returned to the generator's caller.Here’s the syntax, where “exp” is the expression and the optional value is returned by “val”, which is passed to the generator's next() method.[val] = yield [exp];Here are the examples:function* displayRank () { var selPlayers= [1, 2, 3, 4]; for (var a = 0; a < selPlayers.length; a++) { yield selPlayers[i]; } }After defining a generator function, use it like the following.Here displayRank() is the generator function:var rank = displayRank(); ... Read More
To turn a string into a JavaScript function call, try to run the following codeExampleLive Demo function myFunction(argument) { alert('My function ' + argument); } functionName = 'myFunction'; window[functionName]('is working.');