Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
MySQL Articles
Page 338 of 355
MySQL truncate text with ellipsis?
You can truncate the text with ellipsis using LENGTH() with CASE statement. If your length is greater than 7 then truncate the text and add some number otherwise print the number as it is.To understand the above syntax, let us create a table. The query to create a table is as follows:mysql> create table TruncateText -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Number longtext, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command. The query is as follows:mysql> insert into TruncateText(Number) values('64575868667687'); ...
Read MoreConditional NOT NULL case MySQL?
For conditional NOT NULL case, you do not need to use and = operator. You need to use IS NULL and IS NOT NULL property because NULL is a special case in MySQL.To understand the conditional NOT NULL case, let us create a table. The query to create a table is as follows:mysql> create table ConditionalNotNullDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> SendMessage longtext, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table ...
Read MoreSplit a string and loop through values in MySQL Procedure?
To split a string and loop through all values in MySQL procedure, you do not need to use REPLACE() function. To understand, first create a stored procedure and after that create a table and call the stored procedure with some values. The value will be inserted into the table.The query to create a stored procedure is as follows:mysql> DELIMITER // mysql> CREATE PROCEDURE SP_SplitString(Value longtext) -> BEGIN -> DECLARE front TEXT DEFAULT NULL; -> DECLARE frontlen INT DEFAULT NULL; -> DECLARE TempValue TEXT DEFAULT NULL; -> iterator: -> LOOP -> IF LENGTH(TRIM(Value)) ...
Read MoreMySQL stored procedure return value?
To return a value from stored procedure, you need to use user defined session specific variable. Add @ symbol before variable name.For example, use @symbol for variable valido. The syntax for the same is as follows:SELECT @valido;Whenever you use select statement, you need to use @anyVariableName. The syntax is as follows:SELECT @anyVariableName;Here is the demo of stored procedure of return value. The query to create a stored procedure is as follows:mysql> create procedure ReturnValueFrom_StoredProcedure -> ( -> In num1 int, -> In num2 int, -> out valido int ...
Read MoreRetrieve a large select by chunks in MySQL?
To retrieve large select by chunks, you need to use ORDER BY LIMIT. The syntax is as follows:SELECT *FROM yourTableName ORDER BY yourColumnName LIMIT 0, 10;From the above syntax, you will get 10 rows from the table. In the above syntax, 0 represents the first row from the result set of a table that means it is zero index based. The second value of LIMIT represents the maximum number of rows that can be retrieved from the table.If you want the next rows after 10 to 30, then use in LIMIT like this. The syntax is as follows:SELECT *FROM yourTableName ...
Read MoreHow to get the sum for every distinct value in another column in MySQL?
You can get the sum for every distinct value in another column with the help of aggregate function SUM() with GROUP BY command. To understand the above concept, let us create a table. The query to create a table is as follows:mysql> create table SumOfEveryDistinct -> ( -> Id int not null, -> Amount int -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command. The query is as follows:mysql> insert into SumOfEveryDistinct values(10, 100); Query OK, 1 row affected (0.19 ...
Read MoreMySQL: Insert a row and get the content?
In order to do insert a row and get the content, you need to use stored procedure, First, you need to create a table. After that you need to create a stored procedure that will insert a row and get the content to the end user.To do the above task, let us first create a table. The query to create a table is as follows:mysql> create table InsertRecord_SelectTable -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Name varchar(20), -> PRIMARY KEY(Id) -> ); Query ...
Read MoreWhen the MySQL delimiter error occur?
The MySQL delimiter occurs when you are using a pipe delimiter(|) with semicolon (;) and using MySQL version lower than 8.0.12.MySQL treats the pipe (|) as one delimiter and semicolon (;) is another delimiter. Therefore, do not confuse the MySQL delimiter with pipe as well as semicolon.Note: Here, we are using MySQL version 8.0.12. The pipe delimiter works fine with semicolon. If you are using version lower than 8.0.12, then this leads to a delimiter error.Here is the working of MySQL delimiter:mysql> delimiter |; mysql> create procedure getSumOfTwoNumbers() -> begin -> select 2+3 as ...
Read MoreHow to use GROUP BY to concatenate strings in MySQL and how to set a separator for the concatenation?
To concatenate strings in MySQL with GROUP BY, you need to use GROUP_CONCAT() with a SEPARATOR parameter which may be comma(‘) or space (‘ ‘) etc.The syntax is as follows:SELECT yourColumnName1, GROUP_CONCAT(yourColumnName2 SEPARATOR ‘yourValue’) as anyVariableName FROM yourTableName GROUP BY yourColumnName1;To understand the above syntax, let us create a table. The query to create a table is as follows:mysql> create table GroupConcatenateDemo -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.99 sec)Insert some records in the table using insert command. The query to insert record is as follows:mysql> insert ...
Read MoreHow to specify Decimal Precision and scale number in MySQL database using PHPMyAdmin?
You need to select a database when you are creating a table. Right now, I have a sample database. The snapshot is as follows:Now you need to give the table name as well as the number of columns you want:After that you need to press Go button. Now, the following section would be visible:The DECIMAL requires two parameter i.e. Total Number of Digit and second one is DigitAfterDecimalPoint.The structure of DECIMAL is as follows:DECIMAL(X, Y)Here, X is TotalNumberOfDigit and Y is DigitAfterDecimalPoint.Let us see an example:DECIMAL(6, 4)Above, we will be having 6 digit sand 2 digit safter decimal point. For ...
Read More