MySQLi Articles - Page 26 of 341

To return the field with highest count, use ORDER BY COUNT(*). Let us first create a table −mysql> create table DemoTable1940    (    FirstName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1940 values('Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1940 values('Mike'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1940 values('Adam'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1940 values('Mike'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1940 values('Chris'); Query OK, 1 row ... Read More

For this, you can use LEFT(). Let us first create a table −mysql> create table DemoTable1939    (    FullName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1939 values('Adam Smith'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1939 values('Robert Downey, Jr.'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1939 values('Sylvester Stallone'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1939 values('Chris Hemsworth'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> ... Read More

To display all fields, set the database with table_schema and specific table with table_name as in the below syntax −select column_name as anyAliasName from information_schema.columns    where table_schema=database()    and table_name=’yourTableName’\GLet us first create a table −mysql> create table DemoTable1938    (    StudentId int,    StudentName varchar(20),    StudentAge int,    StudentCountryName varchar(20),    StudentMobileNumber bigint    ); Query OK, 0 rows affected (0.00 sec)Here is the query to display all fields of a table −mysql> select column_name as ALL_FIELDS from information_schema.columns    where table_schema=database()    and table_name='DemoTable1938'\GThis will produce the following output −*************************** 1. row *************************** ALL_FIELDS: StudentId ... Read More

For this, use CASE statement with ORDER BY. Let us first create a table −mysql> create table DemoTable1937    (    Name varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1937 values('Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1937 values(NULL); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1937 values('Adam'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1937 values('John'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1937 values(''); Query OK, 1 row affected (0.00 sec) ... Read More

To perform multiple inserts, the syntax is as follows −insert into yourTableName(yourColumnName1, yourColumnName2, yourColumnName3, ..N)    select yourValue1 as yourColumnName1, yourValue2 as yourColumnName2, yourValue3 as yourColumnName3, ......N    union    select yourValue1 as yourColumnName1, yourValue2 as yourColumnName2, yourValue3 as yourColumnName3, ......N . . NTo understand the above syntax, let us create a table −mysql> create table DemoTable1936    (    StudentId int,    StudentName varchar(20),    StudentCountryName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1936(StudentId, StudentName, StudentCountryName)    select 1001 as StudentId, 'Chris' as StudentName, 'US' ... Read More

For this, use RLIKE and filter records as in the below syntax &Minus;select * from yourTableName    where yourColumnName rlike 'yourValue1|yourValue2';Let us first create a table −mysql> create table DemoTable1935    (    Subject varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1935 values('MySQL'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1935 values('Python'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1935 values('MongoDB'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1935 values('SQL Server'); Query OK, 1 row affected (0.00 ... Read More

For getting average, use AVG() and use it with DISTINCT to calculate from distinct records. Let us first create a table −mysql> create table DemoTable1934    (    StudentName varchar(20),    StudentMarks int    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1934 values('Chris', 56); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1934 values('Chris', 56); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1934 values('David', 78); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1934 values('David', 78); Query OK, 1 row affected ... Read More

Use ORDER BY to fix a record and then displayselect * from yourTableName order by yourColumnName1=yourValue desc, yourColumnName2;Let us first create a table −mysql> create table DemoTable1932    (    UserName varchar(20),    ShippingDate date    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1932 values('Chris', '2018-10-12'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1932 values('David', '2019-04-11'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1932 values('Mike', '2016-12-04'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1932 values('Carol', '2017-12-26'); Query OK, 1 ... Read More

For month and year in a specific format, use DATE_FORMAT() along with STR_TO_DATE(). Let us first create a table −mysql> create table DemoTable1931    (    ShippingDate varchar(40)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1931 values('10-11-2017'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1931 values('31-01-2019'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1931 values('02-02-2018'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1931 values('10-06-2013'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select ... Read More

For this, you can use date_add(). Let us first create a table −mysql> create table DemoTable1930    (    DueTime datetime    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1930 values('2017-10-21'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1930 values('2019-12-14'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1930 values('2018-11-26'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1930 values('2014-06-16'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1930;This will ... Read More