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Articles by AmitDiwan
Page 753 of 840
Combine columns into rows with MySQL?
To combine columns into rows, use UNION ALL. Following is the syntax −Syntaxselect yourColumnName1 from yourTableName union all select yourColumnName2 from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> Value1 int, -> Value2 int -> ); Query OK, 0 rows affected (0.88 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 200); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(500, 600); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will ...
Read MoreShould I use a loop or 'OR' operator to query a bunch of stuff at a fast pace In MYSQL?
For faster querying, you need to use MySQL IN(). Let us first create a table −mysql> create table DemoTable1538 -> ( -> ClientId int, -> ClientName varchar(20) -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1538 values(101, 'Chris'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1538 values(102, 'Robert'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1538 values(103, 'Bob'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1538 values(104, 'Adam'); Query OK, 1 row affected (0.16 sec)Display ...
Read MoreHow to create a column of months from date and display sum of the corresponding column wherein you find duplicate dates?
For this can use DATE_FORMAT() in MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> PurchaseDate date, -> Amount int -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-10-12', 500); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('2018-10-12', 1000); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('2019-01-10', 600); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('2018-10-12', 600); Query OK, 1 row affected (0.15 sec) mysql> insert ...
Read MoreHow to write a single MySQL query for displaying a value for multiple inputs?
For this, use BETWEEN keyword. Let us first create a table −mysql> create table DemoTable1537 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20) -> ); Query OK, 0 rows affected (0.72 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1537(StudentName) values('Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1537(StudentName) values('Bob'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1537(StudentName) values('Sam'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1537(StudentName) values('Mike'); Query OK, 1 row affected (0.16 sec) mysql> insert into ...
Read MoreUsing Update statement with TINYINT in MySQL?
Let us first create a table. We have set one of the columns with type TINYINT −mysql> create table DemoTable -> ( -> EmployeeId int, -> isMarried tinyint -> ); Query OK, 0 rows affected (6.84 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(101, true); Query OK, 1 row affected (1.94 sec) mysql> insert into DemoTable values(102, false); Query OK, 1 row affected (0.76 sec) mysql> insert into DemoTable values(103, true); Query OK, 1 row affected (1.14 sec) mysql> insert into DemoTable values(104, true); Query OK, 1 row affected (1.22 ...
Read MoreA single MySQL query to search multiple words from different column values
For this, you can use WHERE clause with multiple LIKE. Let us first create a table −mysql> create table DemoTable1536 -> ( -> Sentence text -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1536 values('I like MySQL database.'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1536 values('Java is an Object Oriented Programming Language'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable1536 values('I only like data structure'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1536 values('MongoDB is ...
Read MoreMySQL Order by beginning letter?
To order by the first letter, use ORDER BY CASE statement. Let us first create a table −mysql> create table DemoTable1535 -> ( -> Value varchar(100) -> ); Query OK, 0 rows affected (2.26 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1535 values('MySQL is good relational database.'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1535 values('is MySQL easy to lean'); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable1535 values('You need to start basic SQL'); Query OK, 1 row affected (0.35 sec)Display all records from the table ...
Read MoreCount(*) rows from multiple tables in MySQL?
To count rows from multiple tables in MySQL, the syntax is as follows −Select (select count(*) from yourTableName1) as anyAliasName1, (select count(*) from yourTableName2) as anyAliasName2 from dual;Let us first create a table −mysql> create table DemoTable1 -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY -> ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(), (), (), (), (), (); Query OK, 6 rows affected (0.24 sec) Records: 6 Duplicates: 0 Warnings: 0Display all records from the ...
Read MoreOrder a column in MySQL with IP Address records?
For this, use INET_ATON() in MySQL. The INET_ATON() method would allow a user to convert IP Address records to a number and then we can use ORDER BY to order them.Let us first create a table −mysql> create table DemoTable -> ( -> IpAddress varchar(50) -> ); Query OK, 0 rows affected (1.36 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('192.168.110.78'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('192.168.110.87'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values('192.168.110.75'); Query OK, 1 row affected (0.26 ...
Read MoreMySQL equivalent to Sybase ASE command?
The MySQL equivalent to sybase ASE command is EXPLAIN keyword. Let us first create a table −mysql> create table DemoTable1531 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20) -> ); Query OK, 0 rows affected (2.92 sec) mysql> create index Name_index1 on DemoTable1531(StudentName); Query OK, 0 rows affected (0.99 sec) Records: 0 Duplicates: 0 Warnings: 0Insert some records in the table using insert command −mysql> insert into DemoTable1531(StudentName) values('Chris'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1531(StudentName) values('Robert'); Query OK, 1 row affected (0.10 sec) mysql> insert into ...
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