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MySQL Articles
Page 183 of 355
Fix Error 1136: Column count doesn't match value count at row 1?
You may get tis value, if you are missing the value for auto_increment column. The error is as follows −mysql> insert into DemoTable1353 values('Chris', 23); ERROR 1136 (21S01): Column count doesn't match value count at row 1You need to provide the value for auto_increment or leave it to automatic generation.Let us see an example and create a table −mysql> create table DemoTable1353 -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Name varchar(20), -> Age int, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.52 sec)Insert ...
Read MoreCast one of the values in MySQL and perform division with the other?
For this, at first, use CAST(). Let us first create a table −mysql> create table DemoTable1352 -> ( -> Value1 int, -> Value2 int -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command−mysql> insert into DemoTable1352 values(10, 30); Query OK, 1 row affected (0.42 sec) mysql> insert into DemoTable1352 values(40, 60); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1352 values(110, 130); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement−mysql> select * from DemoTable1352; This ...
Read MoreDisplay only the duplicate column names appearing atleast thrice in MySQL
Use HAVING COUNT() for this. Let us first create a table −mysql> create table DemoTable1351 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(40) -> ); Query OK, 0 rows affected (1.08 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1351(StudentName) values('Chris'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1351(StudentName) values('Bob'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1351(StudentName) values('Bob'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1351(StudentName) values('David'); Query OK, 1 row affected (0.11 ...
Read MoreAvoiding rewrite attributes with MySQL AUTO_INCREMENT
You can avoid with the help of providing the value (NULL, 0, DEFAULT) with AUTO_INCREMENT. Let us first create a table −mysql> create table DemoTable1350 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20) -> ); Query OK, 0 rows affected (0.44 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1350 values(NULL, 'Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1350 values(0, 'Chris'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1350 values(DEFAULT, 'Chris'); Query OK, 1 row affected (0.10 sec)Display all records ...
Read MoreUpdating a MySQL table row column by appending a value from user defined variable?
Let us first create a table −mysql> create table DemoTable1349 -> ( -> ProductId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ProductPrice int -> ); Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1349(ProductPrice) values(7644); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable1349(ProductPrice) values(90843); Query OK, 1 row affected (0.06 sec) mysql> insert into DemoTable1349(ProductPrice) values(9083); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1349(ProductPrice) values(10000); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement ...
Read MoreHow to order and select query with conditions in MySQL?
Following is the syntax −select * from yourTableName order by yourColumnName=0, yourColumnName;Let us first create a table −mysql> create table DemoTable1348 -> ( -> Amount int -> ); Query OK, 0 rows affected (0.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1348 values(100); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1348 values(0); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1348 values(90); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1348 values(45); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1348 values(0); Query ...
Read MoreUpdate a column based on another MySQL table's column
For this, you can use the join concept. Let us first create a table −mysql> create table DemoTable1 -> ( -> Id int, -> Name varchar(10) -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(100, 'Bob'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select * from DemoTable1;This will produce the following output −+------+------+ | Id | Name | +------+------+ | 100 | Bob | +------+------+ 1 row in set (0.00 ...
Read MoreHow to mask user email addresses with a different domain in MySQL?
Let us first create a table −mysql> create table DemoTable1345 -> ( -> UserEmailAddress text -> ); Query OK, 0 rows affected (0.42 sec)Insert some records in the table using insert command. We have inserted email address here −mysql> insert into DemoTable1345 values('Carol123@gmail.com'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1345 values('987Sam@gmail.com'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1345 values('David_Miller@gmail.com'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1345 values('Bob@gmail.com'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select * ...
Read MoreMySQL query to select rows where column value is only 0, group by another column?
For this, use group by. Let us first create a table −mysql> create table DemoTable1344 -> ( -> `SequenceId` int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ClientId int, -> isMarried tinyint(1) -> ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1344(ClientId, isMarried) values(4567, 0); Query OK, 1 row affected (0.45 sec) mysql> insert into DemoTable1344(ClientId, isMarried) values(9876, 0); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1344(ClientId, isMarried) values(5432, 1); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1344(ClientId, isMarried) ...
Read MoreInsert all the values in a table with a single MySQL query separating records by comma
Let us first create a table −mysql> create table if not exists DemoTable1343 -> ( -> `_ClientId` int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ClientName varchar(40), -> ClientProjectDeadline date -> )ENGINE=MyISAM, AUTO_INCREMENT=1000; Query OK, 0 rows affected (0.21 sec)Insert some records in the table using insert command with a single query −mysql> insert into DemoTable1343(ClientName, ClientProjectDeadline) values('Chris', '2019-09-24'), ('Bob', '2015-12-09'), -> ('Mike', '2017-01-20'), ('Carol', '2018-03-31'); Query OK, 4 rows affected (0.10 sec) Records: 4 Duplicates: 0 Warnings: 0Display all records from the table using select statement −mysql> select * from DemoTable1343;This will produce the ...
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