Question: How do you find odd and even records in SQL?

How do you find a specific record in SQL?

To select rows using selection symbols for character or graphic data, use the LIKE keyword in a WHERE clause, and the underscore and percent sign as selection symbols. You can create multiple row conditions, and use the AND, OR, or IN keywords to connect the conditions.

How do I count the number of rows in SQL?

The COUNT() function returns the number of rows that matches a specified criteria.

  1. SQL COUNT(column_name) Syntax. The COUNT(column_name) function returns the number of values (NULL values will not be counted) of the specified column: …
  2. SQL COUNT(*) Syntax. …
  3. SQL COUNT(DISTINCT column_name) Syntax.

How do you find the nth record in SQL?

ROW_NUMBER (Window Function)

ROW_NUMBER (Window Function) is a standard way of selecting the nth row of a table. It is supported by all the major databases like MySQL, SQL Server, Oracle, PostgreSQL, SQLite, etc.

What is offset in SQL query?

SQL | OFFSET-FETCH Clause

  • OFFSET.
  • The OFFSET argument is used to identify the starting point to return rows from a result set. Basically, it exclude the first set of records. Note:
  • FETCH.
  • The FETCH argument is used to return a set of number of rows. FETCH can’t be used itself, it is used in conjuction with OFFSET. Syntax:
THIS IS IMPORTANT:  How do you change case to insensitive in MySQL?

How do you check if a number is even in SQL?

Syntax. To find and return the records with the odd or even values, the most simple way is to check the remainder when we divide the column value by 2. When the remainder is 0, that’s an even number, otherwise, that’s an odd number.

How do you capitalize all letters in SQL?

The SQL UPPER function converts all the letters in a string into uppercase. If you want to convert a string to lowercase, you use the LOWER function instead.

How do you do not in SQL?

Overview. The SQL Server NOT IN operator is used to replace a group of arguments using the (or !=) operator that are combined with an AND. It can make code easier to read and understand for SELECT, UPDATE or DELETE SQL commands.

How do you check if a column is empty in SQL?

How do I check if a column is empty or null in MySQL?

  1. MySQL code: select isnull(mycolumn) from mytable returns 1 if mycolumn is null. – Eric Leschinski. …
  2. what about length(trim(mycolumn)) > 0 ? – Cyril Jacquart. …
  3. For MSSQL > WHERE COLUMN ” OR WHERE LEN(COLUMN) > 0 OR WHERE NULLIF(LTRIM(RTRIM(COLUMN)), ”) IS NOT NULL.

How do I find missing data in MySQL?

To get the range of where the gaps from and to we need to do something a little more complex. SELECT t1. id+1 AS ‘Missing From’, MIN(t2.id) – 1 AS ‘To’ FROM table AS t1, table AS t2 WHERE t1.id What is missing keyword in SQL?

The ORA-00905: missing keyword error occurs when the Oracle parser expects a keyword in the sql query but it is missing. … The cause might be incorrect SQL Statement use or syntax that Oracle does not support. The Oracle parser anticipates a reserved keyword that is not present in the SQL query.

THIS IS IMPORTANT:  Can you use HTML with node js?