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Articles by karthikeya Boyini
Page 120 of 143
How to correctly use INSERT INTO ... SELECT in MySQL to avoid Error 1064?
Let us first create a table −mysql> create table DemoTable1 -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> FirstName varchar(100) -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1(FirstName) values('John'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1(FirstName) values('Chris'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;This will produce the following output −+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | John ...
Read MoreHow can we grant a user to access all stored procedures in MySQL?
Let us first display all users and host from the table MySQL.user −mysql> select user, host from Mysql.user;This will produce the following output −+------------------+-----------+ | user | host | +------------------+-----------+ | Bob | % | | Charlie | % | | Robert | % | | User2 | % ...
Read MoreCan we return query results in same order as the values in MySQL `IN(...)` statement?
Yes, you can achieve this with ORDER BY FIELD() from MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Number int -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(19); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(30); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(34); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values(28); Query OK, 1 row ...
Read MoreSplit a column after hyphen in MySQL and display the remaining value?
To split a column after hyphen, use the SUBSTRING_INDEX() method −select substring_index(yourColumnName, '-', -1) AS anyAliasName from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> StreetName text -> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Paris Hill St.-CA-83745646') ; Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values('502 South Armstrong Street-9948443'); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreHow to cut part of a string with a MySQL query?
For this, use substring_index() function from MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> StudentId varchar(100) -> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('STU-1011'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('STU-95968686'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------------+ | StudentId | +--------------+ | STU-1011 ...
Read MoreHow to extract the area codes from a phone number with MySQL?
Let’s say we have a list of phone numbers and from that we want to get the area codes. These area codes are for example, the first 3 digits of the phone number. Use LEFT() function from MySQL for this.Let us first create a table −mysql> create table DemoTable -> ( -> AreaCodes varchar(100) -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command. Here, let’s say we have included the phone numbers −mysql> insert into DemoTable values('90387568976') ; Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('90389097878' ; ...
Read MoreBest data type for storing large strings in MySQL?
You can use text data type to store large strings. Following is the syntax −CREATE TABLE yourTableName ( yourColumnName text, . . N );Let us first create a table −mysql> create table DemoTable -> ( -> MyStringValue text -> ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('This is a text data type to store large string'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreC++ Program to Find Second Smallest of n Elements with Given Complexity Constraint
This is a C++ program to find Second Smallest of n elements with given complexity constraint.AlgorithmBegin function SecondSmallest() : /* Arguments to this function are: A pointer array a. Number of elements n */ // Body of the function: A variable s1 is declared as to keep track of smallest number. A variable s2 is declared as to keep track of second smallest number. Initialize both s1 and s2 with INT_MAX. Traverse ...
Read MoreImplement MySQL ORDER BY without using ASC or DESC?
For this, you can use FIND_IN_SET(). Let us first create a table −mysql> create table DemoTable -> ( -> Number int -> ); Query OK, 0 rows affected (2.25 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.91 sec) mysql> insert into DemoTable values(60); Query OK, 1 row affected (0.69 sec) mysql> insert into DemoTable values(40); Query OK, 1 row affected (0.72 sec) mysql> insert into DemoTable values(800); Query OK, 1 row affected (0.75 sec)Display all records ...
Read MoreMySQL query to find all rows where string contains less than four characters?
Use CHAR_LENGTH() and find the count of characters in every string and then get the strings which are less than four characters. Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (1.38 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Bob'); Query OK, 1 row affected (1.60 sec) mysql> insert into DemoTable values('Carol'); Query OK, 1 row affected (0.25 ...
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