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Articles on Trending Technologies
Technical articles with clear explanations and examples
MySQL query to get next closest day between two days?
Following is the syntax −select * from yourTableName order by ( yourColumnName> now()) desc, (case when yourColumnName > now() then yourColumnName end) , yourColumnName desc limit 1;Let us first create a table −mysql> create table DemoTable1454 -> ( -> ShippingDate date -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1454 values('2019-10-01'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable1454 values('2019-10-03'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable1454 values('2019-10-05'); Query OK, 1 row affected (0.25 sec) mysql> insert ...
Read MorePrint structured MySQL SELECT at command prompt
To print, the syntax is as follows −mysql -uroot -t -e "your Select Query " -pTo implement the above syntax, let us open the command prompt −Now, reach the MySQL bin −Let us implement the above syntax to easily print structured SQL select. Following is the query −This will produce the following output −
Read MoreCount duplicate ids and display the result in a separate column with MySQL
Let us first create a table −mysql> create table DemoTable1453 -> ( -> CustomerId int, -> CustomerReviewNumber int -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1453 values(10, 4); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1453 values(10, 4); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 ...
Read MoreCount multiple rows and display the result in different columns (and a single row) with MySQL
Let us first create a table −mysql> create table DemoTable1452 -> ( -> FavouriteColor varchar(50) -> ); Query OK, 0 rows affected (2.42 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1452 values('Red'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable1452 values('Blue'); Query OK, 1 row affected (0.42 sec) mysql> insert into DemoTable1452 values('Blue'); ...
Read MoreHow to update a MySQL date type column?
Let us first create a table −mysql> create table DemoTable1451 -> ( -> JoiningDate date -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1451 values('2019-07-21'); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1451 values('2018-01-31'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1451 values('2017-06-01'); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select * from DemoTable1451;This will produce the following output −+-------------+ | JoiningDate | +-------------+ | 2019-07-21 | | 2018-01-31 | ...
Read MoreDisplay matching repeated date records only once in MySQL
Let’s say we are finding records matching with the current date. Since we want repeated matching records only once, use LIMIT.For example, the current date is −2019-10-02Let us first create a table −mysql> create table DemoTable1450 -> ( -> DueDate date -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1450 values('2019-09-30'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1450 values('2019-10-02'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1450 values('2019-10-02'); Query OK, 1 row affected (0.10 sec) mysql> insert into ...
Read MoreReturn maximum value from records in MySQL
Let us first create a table −mysql> create table DemoTable1449 -> ( -> PlayerId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> PlayerScore int -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1449(PlayerScore) values(1040); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1449(PlayerScore) values(1450); Query OK, 1 row affected (0.34 sec) mysql> insert into DemoTable1449(PlayerScore) values(1890); Query OK, 1 row affected (0.72 sec) mysql> insert into DemoTable1449(PlayerScore) values(1650); Query OK, 1 row affected (0.25 sec)Display all records from the table using select statement ...
Read MoreCheck if the current date falls in a given date range using MySQL query
Let us first create a table −mysql> create table DemoTable1448 -> ( -> StartDate date, -> EndDate date -> ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1448 values('2019-01-21', '2019-03-22'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1448 values('2019-04-05', '2019-10-10'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1448 values('2019-10-01', '2019-10-29'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1448 values('2018-12-31', '2019-12-31'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> ...
Read MoreMySQL db query to fetch records from comma separate values on the basis of a specific value
For this, you can use REGEXP in MySQL. Let’s say you want the row records wherein any of the comma separated value is 90. For this, use regular expression.Let us first create a table −mysql> create table DemoTable1447 -> ( -> Value varchar(100) -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1447 values('19, 58, 90, 56'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1447 values('56, 89, 99, 100'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1447 values('75, 76, 65, ...
Read MoreSet conditions in a MySQL stored procedure
To set conditions in a stored procedure, use IF...ELSE in MySQL. Following is the syntax for if-else −IF yourCondition then yourStatement1, ELSE yourStatement2, END IF;Let us implement the above syntax in a stored procedure −mysql> DELIMITER // mysql> CREATE PROCEDURE IF_ELSE_DEMO(IN value int) -> BEGIN -> SET @val=value; -> IF @val > 10 then -> select concat(@val, ' is greater than 10'); -> ELSE -> select concat(@val, ' is less than 10 '); -> END ...
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