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To shuffle elements, you need to use ORDER BY RAND(). Let us first create a table −mysql> create table DemoTable1557 -> ( -> SubjectId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> SubjectName varchar(20) -> ); Query OK, 0 rows affected (0.91 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1557(SubjectName) values('MySQL'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1557(SubjectName) values('MongoDB'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1557(SubjectName) values('Java'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1557(SubjectName) values('C'); Query OK, 1 row affected ... Read More
Let us first create a table −mysql> create table DemoTable1 -> ( -> Id int, -> FirstName varchar(20) -> ); Query OK, 0 rows affected (0.52 sec)Here is the query to create second table −mysql> create table DemoTable2 -> ( -> EmployeeId int, -> EmployeeName varchar(20) -> ); Query OK, 0 rows affected (0.51 sec)Let us now create a trigger to update MySQL table on insert command −mysql> DELIMITER // mysql> CREATE TRIGGER updateDemoOnInsert -> AFTER INSERT ON DemoTable2 -> FOR EACH ... Read More
Use FULLTEXT search to quickly search for a string. Let us first create a table −mysql> create table DemoTable1554 -> ( -> Title text -> ); Query OK, 0 rows affected (0.63 sec)Here is the query to create full text search −mysql> create fulltext index faster_title on DemoTable1554(Title); Query OK, 0 rows affected, 1 warning (7.09 sec) Records: 0 Duplicates: 0 Warnings: 1Insert some records in the table using insert command −mysql> insert into DemoTable1554 values('John is working on MySQL database'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable1554 values('Adam Smith is working on ... Read More
For this, you can use UNIQUE KEY. Let us first create a table −mysql> create table DemoTable1553 -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(20), -> EmployeeSalary int -> ); Query OK, 0 rows affected (0.47 sec)Here is the query to add unique key −mysql> alter table DemoTable1553 add unique(EmployeeSalary); Query OK, 0 rows affected (0.53 sec) Records: 0 Duplicates: 0 Warnings: 0Insert some records in the table using insert command −mysql> insert into DemoTable1553(EmployeeName, EmployeeSalary) values('Chris', 45000); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1553(EmployeeName, EmployeeSalary) ... Read More
Use single quotes on string input value. If there is an identifier like table name or column name, then do not use single quotes (use backticks).Let us first create a table −mysql> create table DemoTable1552 -> ( -> `key` int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.82 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1552 values(101, 'Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1552 values(102, 'David'); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable1552 values(103, 'Mike'); Query OK, 1 row ... Read More
For this, you can use ORDER BY clause along with LIMIT. Let us first create a table −mysql> create table DemoTable1551 -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(20) -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1551(EmployeeName) values('Chris'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable1551(EmployeeName) values('Robert'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1551(EmployeeName) values('Mike'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1551(EmployeeName) values('Sam'); Query OK, 1 row ... Read More
To search from a comma-separated column, use the FIND_IN_SET() method. Let us first create a table −mysql> create table DemoTable -> ( -> Value varchar(20) -> ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('41, 14, 94'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('64, 84, 94'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('44, 74, 103, 104'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('904, 1004, 1444, 1544'); Query OK, 1 row ... Read More
To maintain the custom order of IDs, use ORDER BY CASE statement. Let us first create a table −mysql> create table DemoTable1550 -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1550 values(101, 'Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1550 values(110, 'Bob'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable1550 values(105, 'Carol'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1550 values(109, 'Mike'); Query OK, 1 row ... Read More
You can make use of CL_ABAP_FILE_UTILITIES => CHECK_FOR_BOM to define file encoding type and use constantly of class CL_ABAP_CHAR_UTILITIES to process the files.ClassCL_ABAP_CHAR_UTILITIESShort DescriptionUtilities for Processing Characters
For this, you can use the INSERT INTO SELECT statement. To format the date, use the DATE_FORMAT() function. Let us first create a table −mysql> create table DemoTable -> ( -> DateOfJoining datetime, -> JoiningDate text -> ); Query OK, 0 rows affected (0.79 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(DateOfJoining) values('2019-10-26 13:52:10'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(DateOfJoining) values('2018-12-31 15:20:40'); Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement−mysql> select *from DemoTable;This will produce the following output −+---------------------+-------------+ ... Read More