Found 6702 Articles for Database

Order date records and fetch the 2nd ordered record in MySQL

AmitDiwan
Updated on 12-Nov-2019 05:24:35

85 Views

To order, use ORDER BY and to fetch only the 2nd ordered record, use MySQL LIMIT and set offset as well. Let us first create a −mysql> create table DemoTable1417    -> (    -> CustomerId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> CustomerName varchar(20),    -> ShippingDate date    -> ); Query OK, 0 rows affected (1.10 sec)Insert some records in the table using insert −mysql> insert into DemoTable1417(CustomerName, ShippingDate) values('Chris', '2019-01-21'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1417(CustomerName, ShippingDate) values('David', '2018-12-01'); Query OK, 1 row affected (0.55 sec) mysql> insert into DemoTable1417(CustomerName, ShippingDate) ... Read More

Fetch substrings from a string with words separated by slash in MySQL?

AmitDiwan
Updated on 12-Nov-2019 05:21:14

127 Views

For this, you can use SUBSTRING_INDEX(). Let us first create a −mysql> create table DemoTable1416    -> (    -> StudentCode varchar(100)    -> ); Query OK, 0 rows affected (1.56 sec)Insert some records in the table using insert −mysql> insert into DemoTable1416 values('101/John/Smith'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1416 values('901/Carol/Taylor'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1416 values('400/David/Miller'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select −mysql> select * from DemoTable1416;This will produce the following output −+------------------+ | StudentCode      | +------------------+ | ... Read More

How to sum the values in the table by month with MySQL?

AmitDiwan
Updated on 12-Nov-2019 05:19:52

2K+ Views

For this, use EXTRACT(), that would allow you to extract specific month records. For example, to add all the prices in January (irrespective of the year).Let us first create a −mysql> create table DemoTable1415    -> (    -> ProductPurchaseDate date,    -> ProductPrice int    -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert −mysql> insert into DemoTable1415 values('2019-01-12', 560); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1415 values('2018-01-14', 1060); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1415 values('2017-03-21', 780); Query OK, 1 row affected (0.11 ... Read More

Select multiple Book Titles that share the minimum (PRICE) value in MySQL?

AmitDiwan
Updated on 12-Nov-2019 05:17:49

156 Views

For this, use MySQL MIN(). Let us first create a −mysql> create table DemoTable1414    -> (    -> BookTitle varchar(40),    -> BookPrice int    -> ); Query OK, 0 rows affected (0.82 sec)Insert some records in the table using insert −mysql> insert into DemoTable1414 values('Deep dive using java', 560); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1414 values('C++ in depth', 360); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1414 values('Data structure in C', 590); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1414 values('Algorithm in C++', 1090); Query OK, 1 ... Read More

Fastest way to search for a date from the date records in MySQL

AmitDiwan
Updated on 12-Nov-2019 05:15:05

219 Views

The fastest and easiest way is to use the MySQL BETWEEN keyword. Let us first create a −mysql> create table DemoTable1413    -> (    -> EmployeeName varchar(20),    -> EmployeeJoiningDate datetime    -> ); Query OK, 0 rows affected (0.45 sec)Insert some records in the table using insert −mysql> insert into DemoTable1413 values('Chris', '2018-09-28 11 :10 :50'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1413 values('David', '2019-09-28 11:10:50'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1413 values('Mike', '2019-09-29 12:40:00'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1413 values('Carol', '2019-09-28 12:06:10'); ... Read More

MySQL query to check if a certain row has only two words?

AmitDiwan
Updated on 12-Nov-2019 05:13:35

269 Views

For this, use Regular Expression in MySQL as in the below syntax −select * from yourTableName where yourColumnName regexp '^[^ ]+[ ]+[^ ]+$';The above query will work when the two words are separated by a space. Let us first create a −mysql> create table DemoTable1412    -> (    -> Name varchar(40)    -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert −mysql> insert into DemoTable1412 values('John Adam Carol'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1412 values('Mike Sam'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1412 ... Read More

MySQL query to find a value in a set of values separated by comma in a custom variable

AmitDiwan
Updated on 12-Nov-2019 05:12:02

177 Views

For this, use FIND_IN_SET() in MySQL and use the value from a custom variable. Let us first create a −mysql> create table DemoTable1411    -> (    -> Value int    -> )    -> ; Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert −mysql> insert into DemoTable1411 values(10); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1411 values(50); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1411 values(60); Query OK, 1 row affected (0.08 sec)Display all records from the table using select −mysql> select * from DemoTable1411;This will produce ... Read More

How to mask data fields in MySQL?

AmitDiwan
Updated on 12-Nov-2019 05:08:56

1K+ Views

To mask data fields, use CONCAT() along with REPEAT(). Here, we will mask data fields with #. Let us first create a −mysql> create table DemoTable1410    -> (    -> Password varchar(80)    -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert −mysql> insert into DemoTable1410 values('John12345678'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1410 values('Carol_897'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1410 values('David_5647383'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select −mysql> select * from DemoTable1410;This will produce ... Read More

How to add duplicate varchar values without displaying error in MySQL?

AmitDiwan
Updated on 11-Nov-2019 11:08:27

71 Views

For this, let us see an example and first create a −mysql> create table DemoTable1409    -> (    -> FirstName varchar(20),    -> UNIQUE KEY UN_FirstName(FirstName)    -> ); Query OK, 0 rows affected (0.79 sec)Following is the query to add duplicate varchar −mysql> alter table DemoTable1409 drop index  UN_FirstName; Query OK, 0 rows affected (0.40 sec) Records: 0  Duplicates: 0  Warnings: 0Insert some records in the table using insert −mysql> insert into DemoTable1409 values('Chris'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1409 values('Chris'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1409 values('David'); ... Read More

How to include quotes in comma separated column with MySQL?

AmitDiwan
Updated on 11-Nov-2019 11:04:22

736 Views

Let us first create a −mysql> create table DemoTable1407    -> (    -> Name text    -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert −mysql> insert into DemoTable1407 values('John, Bob'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1407 values('Carol, David, Adam'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1407 values('Mike, Sam, Chris'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select −mysql> select * from DemoTable1407;This will produce the following output −+------------------+ | Name             ... Read More

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