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Articles on Trending Technologies
Technical articles with clear explanations and examples
Using UNIQUE for varchar columns with some conditions in MySQL?
For this, you can use UNIQUE constraint on one or more columns −alter table yourTablleName add unique(yourColumnName1, yourColumnName2, ...N);Let us first create a table −mysql> create table DemoTable1598 -> ( -> EmployeeId int, -> EmployeeName varchar(20), -> EmployeeCountryName varchar(20) -> ); Query OK, 0 rows affected (0.52 sec)Here is the query to implement UNIQUE on varchar columns −mysql> alter table DemoTable1598 add unique(EmployeeName, EmployeeCountryName); Query OK, 0 rows affected (0.55 sec) Records: 0 Duplicates: 0 Warnings: 0Insert some records in the table using insert command −mysql> insert into DemoTable1598 values(101, 'Adam', 'AUS'); Query OK, 1 ...
Read MoreFix ERROR 1093 (HY000): You can't specify target table for update in FROM clause while deleting the lowest value from a MySQL column?
Let us first create a table −mysql> create table DemoTable1597 -> ( -> Marks int -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1597 values(45); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1597 values(59); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable1597 values(43); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1597 values(85); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1597 values(89); Query OK, 1 row affected (0.12 sec)Display all records from the table ...
Read MoreCan we use "rank" as column name with MySQL8?
The rank is a MySQL reserved word defined in MySQL version 8.0.2. Therefore, you cannot use rank as a column name. You need to use backticks around the rank.Let us first check the MySQL version we are working on. Here, I am using MySQL version 8.0.12 −mysql> select version(); +-----------+ | version() | +-----------+ | 8.0.12 | +-----------+ 1 row in set (0.00 sec)The issues by using “rank” as column name are as follows −mysql> create table DemoTable1596 -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20), -> rank int ...
Read MoreMySQL RegExp to fetch records with only a specific number of words
For this, use Regular Expression in MySQL as in the below syntax −select * from yourTableName where yourColumnName regexp '\land[\land ]+[ ]+[\land ]+$';The above query will work when the two words are separated by a space. Let us first create a table −mysql> create table DemoTable1412 -> ( -> Name varchar(40) -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1412 values('John Adam Carol'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1412 values('Mike Sam'); Query OK, 1 row affected (0.15 sec) mysql> insert ...
Read MoreCall Stored Procedures within a Stored Procedure with IF Logic?
To call stored procedures within a stored procedure, the syntax is as follows −If yourInputValue > 100 then call yourProcedureName1(); else call yourProcedureName2(); end If ; ENDLet us implement the above syntax. In order to implement the above concept, let us create a stored procedure −mysql> delimiter // mysql> create procedure Hello_Stored_Procedure() -> BEGIN -> select 'Hello World!!!'; -> END -> // Query OK, 0 rows affected (0.18 sec)The query to create the second stored procedure is as follows −mysql> create procedure Hi_Stored_Procedure() -> BEGIN -> ...
Read MoreInteracting SAP and Navision using 3rd party applications
There are many middleware tools that work as middleware for integrating different applications. There exists a vast variety of them but choosing a correct one is based on the applications being integrated.For integrating the third-party application with either SAP or Navision, you can use Apache Camel. Also, SAP provides a framework - SAP PI - SAP NetWeaver Process Integration.Lately, SAP Business One has emerged as the preferred choice for integration of third-party applications with SAP. It is highly preferred by developers as it provides vast options for handling various use cases. Its working is based on either of the two ...
Read MoreAlternative of SAP .NET Connector
There are various (not many as for JAVA and others) possible ways to achieve the task. One way is to go for existing remote function calls library for establishing a connection. There are free to use wrappers written around RFC to serve the task.Another library available for the same and mostly used is ERPConnect. It is easy to use and provides an easy mechanism to call BAPI, functions and table calls.But the best way to go for use is web services but for that, you have to be on ERP5.0 or higher. In such case, no .NET connector is required ...
Read MoreAlternative to MySQL CASE WHEN in MySQL
Use IF() method as an alternative to CASE WHEN in MySQL. Let us first create a table −mysql> create table DemoTable1593 -> ( -> PlayerScore int -> ); Query OK, 0 rows affected (0.44 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1593 values(78); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1593 values(0); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1593 values(89); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1593 values(0); Query OK, 1 row affected (0.16 sec)Display all records from the table using ...
Read MoreHow to convert varchar "time" to real time in MySQL?
For this, you can use TIME_FORMAT(). Let us first create a table −mysql> create table DemoTable1591 -> ( -> ArrivalTime varchar(20) -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1591 values('1620'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1591 values('2345'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1591 values('2210'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select * from DemoTable1591;This will produce the following output −+-------------+ | ArrivalTime | +-------------+ ...
Read MoreInserting rows in an empty table to test output of ABAP code
You can find the option to either insert a row into a table or change the content of the table using the Table tools/Table display services
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