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Sharon Christine has Published 436 Articles
Sharon Christine
87 Views
Let us first create a table −mysql> create table DemoTable -> ( -> AdmissionDate datetime -> ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-01-10 10:45:10'); Query OK, 1 row affected (0.30 sec) mysql> ... Read More
Sharon Christine
171 Views
For this, use the LEFT() method, which returns a specified number of characters from the left of the string.Let us first create a table −mysql> create table DemoTable -> ( -> FirstName varchar(100) -> ); Query OK, 0 rows affected (0.96 sec)Insert some records in the table ... Read More
Sharon Christine
375 Views
For random, use RAND() method. And for limit on rows, use the LIMIT() method.Let us first create a table −mysql> create table DemoTable -> ( -> ShippingDate datetime -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert ... Read More
Sharon Christine
437 Views
You can use below syntax. Following is the syntax −update yourTableName set yourColumnName=REVERSE(SUBSTRING(REVERSE(yourColumnName), INSTR(REVERSE(yourColumnName), '.')));Let us first create a table −mysql> create table DemoTable -> ( -> Words text -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable ... Read More
Sharon Christine
913 Views
For this, you can use UPDATE and concatenate the new data with the old one to save the old data as well −update yourTableName set yourColumnName=concat(yourColumnName, ", yourValue");Let us first create a table −mysql> create table DemoTable -> ( -> CustomerName varchar(100) -> ); Query OK, 0 rows affected (0.54 ... Read More
Sharon Christine
50 Views
Let us first create a table −mysql> create table DemoTable -> ( -> AdmissionDate varchar(100) -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Wed, 19 Jun 2019 04:10:20'); Query OK, 1 row affected (0.22 ... Read More
Sharon Christine
130 Views
For random records, you can use rand() method. To set the number of records, use the LIMIT −select *from yourTableName order by rand() limit numberOfRecords;Let us first create a table −mysql> create table DemoTable -> ( -> LastName varchar(100) -> ); Query OK, 0 rows affected (0.51 ... Read More
Sharon Christine
767 Views
For this, use SELECT CASE. Let us first create a table −mysql> create table DemoTable -> ( -> Num1 int, -> Num2 int -> ); Query OK, 0 rows affected (0.65 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10, 30); ... Read More
Sharon Christine
67 Views
Since “select” is a reserved word in MySQL, we cannot create a table name with it. But, if you still want to create such a table, surround the word select with quote.Let us first create a table −mysql> create table `select` -> ( -> Number int -> ); Query OK, ... Read More
Sharon Christine
897 Views
To order an alphanumeric column with values like “100X, “2Z”, etc. use the ORDER BY. Let us first create a table −mysql> create table DemoTable -> ( -> StudentId varchar(100) -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into ... Read More