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Articles by AmitDiwan
Page 769 of 840
Select * but ignore displaying results containing a specific character in MySQL
To ignore a specific character, use NOT LIKE operator. Let us first create a table −mysql> create table DemoTable1366 -> ( -> CountryName varchar(20) -> ); Query OK, 0 rows affected (0.77 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1366 values('AUS'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1366 values('UK'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1366 values('US'); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −mysql> select * from DemoTable1366; This will produce the ...
Read MoreFind specific records which has whitespace on the second place in MySQL
For this, use SUBSTR() as in the below syntax −select * from yourTableName where substr(yourColumnName, 2, 1 ) = ' ';Let us first create a table −mysql> create table DemoTable1365 -> ( -> Value varchar(20) -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1365 values('9756757474'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1365 values('3 45322333'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1365 values('8974646363'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1365 values('9 ...
Read MoreUsing MySQL IN() for some column values with underscore
Let us first create a table −mysql> create table DemoTable1363 -> ( -> StudentId varchar(20) -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1363 values('901'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1363 values('702'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1363 values('901_John_Doe'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1363 values('1001_Carol_Taylor'); Query OK, 1 row affected (0.26 sec)Display all records from the table using select statement −mysql> select * from DemoTable1363;This will ...
Read MoreMySQL permissions to view all databases?
For this, the syntax is as follows −revoke show databases on *.* from 'yourUserName'@'yourHostName';Let us display all usernames along with host name −mysql> select user, host from MySQL.user;This will produce the following output −+------------------+-----------+ | user | host | +------------------+-----------+ | Bob | % | | Charlie | % | | Robert | % | | User2 | % ...
Read MoreCreate variables in MySQL stored procedure with DECLARE keyword
Use MySQL DECLARE for variables in stored procedure −DECLARE anyVariableName int DEFAULT anyValue;Let us implement the above syntax in order to create variables in stored procedure −mysql> DELIMITER // mysql> CREATE PROCEDURE variable_Demo() -> BEGIN -> DECLARE lastInsertedId int DEFAULT -1; -> select lastInsertedId; -> set @providedLastId=10001; -> select @providedLastId; -> END -> // Query OK, 0 rows affected (0.32 sec) mysql> DELIMITER ;Now you can call the above stored procedure using CALL command −mysql> call variable_Demo();This will produce the following output −+----------------+ | lastInsertedId | ...
Read MoreTreat a MySQL column field as NULL if it is blank?
Let us first create a table −mysql> create table DemoTable1362 -> ( -> ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ClientName varchar(40) -> ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1362(ClientName) values('Chris'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1362(ClientName) values(' '); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1362(ClientName) values('Bob'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1362(ClientName) values(' '); Query OK, 1 row affected (0.12 sec) mysql> insert ...
Read MoreDelete URLs with specific domains from MySQL database?
To delete URLs with specific domains, use DELETE and LIKE clause.Let us first create a table −mysql> create table DemoTable1361 -> ( -> URL text -> ) ; Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1361 values('Https://www.google.com//?id=1'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1361 values('Https://www.facebook.com//?id=2&name=John'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1361 values('Https://www.yahoo.com//?id=3'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable1361 values('Https://www.google.com//?id=1'); Query OK, 1 row affected (0.16 sec)Display all records from ...
Read MoreGet current year in MySQL WHERE clause?
To get current year, use YEAR() along with CURDATE(). Let us first create a table −mysql> create table DemoTable1360 -> ( -> JoiningYear int -> ) -> ; Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1360 values(1998); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1360 values(2018); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable1360 values(2016); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1360 values(2019); Query OK, 1 row affected (0.13 sec) mysql> ...
Read MoreUsing backticks in CONTACT() gives an error in MySQL
Do not use backticks, you can use single quotes in CONCAT(). Following is the syntax −select concat(yourColumnName1, ' ', yourColumnName2) from yourTableName;Let us first create a table −mysql> create table DemoTable1359 -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1359 values(101, 'Chris'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1359 values(102, 'Adam'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1359 values(103, 'Mike'); Query OK, 1 row ...
Read MoreSum values in MySQL from similar day records
Use GROUP BY and DATE() for this. Let us first create a table −mysql> create table DemoTable1358 -> ( -> PurchaseDate datetime, -> ProductPrice int -> ); Query OK, 0 rows affected (1.59 sec)Insert some records in the table using insert command. Here, we have inserted date records, with some records with similar dates −mysql> insert into DemoTable1358 values('2019-09-20 12:34:00', 450); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable1358 values('2019-09-21 11:00:00', 1050); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable1358 values('2018-09-21 02:10:00', 2050); Query OK, 1 ...
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