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MySQL Articles
Page 266 of 355
How to extract the area codes from a phone number with MySQL?
Let’s say we have a list of phone numbers and from that we want to get the area codes. These area codes are for example, the first 3 digits of the phone number. Use LEFT() function from MySQL for this.Let us first create a table −mysql> create table DemoTable -> ( -> AreaCodes varchar(100) -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command. Here, let’s say we have included the phone numbers −mysql> insert into DemoTable values('90387568976') ; Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('90389097878' ; ...
Read MoreBest data type for storing large strings in MySQL?
You can use text data type to store large strings. Following is the syntax −CREATE TABLE yourTableName ( yourColumnName text, . . N );Let us first create a table −mysql> create table DemoTable -> ( -> MyStringValue text -> ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('This is a text data type to store large string'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreImplement MySQL ORDER BY without using ASC or DESC?
For this, you can use FIND_IN_SET(). Let us first create a table −mysql> create table DemoTable -> ( -> Number int -> ); Query OK, 0 rows affected (2.25 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.91 sec) mysql> insert into DemoTable values(60); Query OK, 1 row affected (0.69 sec) mysql> insert into DemoTable values(40); Query OK, 1 row affected (0.72 sec) mysql> insert into DemoTable values(800); Query OK, 1 row affected (0.75 sec)Display all records ...
Read MoreMySQL query to find all rows where string contains less than four characters?
Use CHAR_LENGTH() and find the count of characters in every string and then get the strings which are less than four characters. Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (1.38 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Bob'); Query OK, 1 row affected (1.60 sec) mysql> insert into DemoTable values('Carol'); Query OK, 1 row affected (0.25 ...
Read MoreHow to return rows that have the same column values in MySQL?
Use GROUP BY clause for this. Let us first create a table −mysql> create table DemoTable -> ( -> StudentId int, -> StudentMarks int -> ); Query OK, 0 rows affected (4.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(23, 58); Query OK, 1 row affected (0.70 sec) mysql> insert into DemoTable values(25, 89); Query OK, 1 row affected (0.46 sec) mysql> insert into DemoTable values(26, 58); Query OK, 1 row affected (1.13 sec) mysql> insert into DemoTable values(28, 98); Query OK, 1 row affected (0.86 sec)Display ...
Read MoreMySQL query to select a count on two separate conditions?
Use CASE statement for this. Let us first create a table −mysql> create table DemoTable -> ( -> StudentMarks int, -> isValid tinyint(1) -> ); Query OK, 0 rows affected (0.68 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(45, 0); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(78, 1); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values(45, 1); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable values(78, 1); Query OK, 1 row affected (0.22 sec) ...
Read MoreHow to SELECT fields from one table and INSERT to another in MySQL?
Let us first create a table −mysql> create table DemoTable1 -> ( -> StudentId int, -> StudentName varchar(20) -> ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(10, 'John'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1 values(11, 'Chris'); Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;Output+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 10 | John ...
Read MoreMySQL query to get only the minutes from datetime?
Let us first create a table −mysql> create table DemoTable -> ( -> ShippingDate datetime -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-01-10 10:04:45'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('2019-06-11 05:45:00'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values('2019-06-12 07:00:55'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+---------------------+ | ShippingDate | +---------------------+ | 2019-01-10 10:04:45 | | 2019-06-11 05:45:00 | | 2019-06-12 07:00:55 | +---------------------+ 3 rows in set (0.00 sec)Here is the query to get minutes in MySQL −mysql> select minute(ShippingDate) as Minutes from DemoTable;Output+---------+ | Minutes | +---------+ | 4 ...
Read MoreConcatenate date and time from separate columns into a single column in MySQL
For this, concatenate both the date and time using CONCAT() function. Let us first create a table −mysql> create table DemoTable -> ( -> ShippingDate date, -> ShippingTime time, -> ShippingDatetime datetime -> ); Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(ShippingDate, ShippingTime) values('2019-01-10', '10:40:20'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(ShippingDate, ShippingTime) values('2019-06-14', '04:00:10'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+--------------+--------------+------------------+ | ShippingDate | ShippingTime | ...
Read MoreDisplay all records ignoring the current date record in MySQL
Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100), -> DueDate datetime -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command. Let’s say the current date is “2019-07-05” −mysql> insert into DemoTable values('Chris', '2019-06-24'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Chris', '2018-01-01'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Robert', '2019-07-05'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values('Carol', '2019-08-03'); Query OK, 1 row affected (0.22 ...
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