What does left () do in SQL?
In SQL Server (Transact-SQL), the LEFT function allows you to extract a substring from a string, starting from the left-most character.
How do I get last 6 digits in SQL?
You can use the modulo operator to easily extract the last 6 digits assuming num is a numeric datatype: select num % 1000000 as num from db where user = ? This will accurately get the last 6 digits from the argument you pass.
How do I extract the first 4 characters in SQL?
SQL Server SUBSTRING() Function
- Extract 3 characters from a string, starting in position 1: SELECT SUBSTRING(‘SQL Tutorial’, 1, 3) AS ExtractString;
- Extract 5 characters from the “CustomerName” column, starting in position 1: …
- Extract 100 characters from a string, starting in position 1:
How do I get the first 3 characters of a string in SQL?
You can use LEN() or LENGTH()(in case of oracle sql) function to get the length of a column. SELECT LEN(column_name) FROM table_name; And you can use SUBSTRING or SUBSTR() function go get first three characters of a column.
Can you use left in SQL?
The LEFT() function extracts a given number of characters from the left side of a supplied string. For example, LEFT(‘SQL Server’, 3) returns SQL . In this syntax: The input_string can be a literal string, variable, or column.
What is the purpose of trigger?
Triggers are used to maintain the referential integrity of data by changing the data in a systematic fashion. Each trigger is attached to a single, specified table in the database. Triggers can be viewed as similar to stored procedures in that both consist of procedural logic that is stored at the database level.
How do I get last two digits in SQL?
To check the last two digits are numbers in column, you can use the following script. Here RIGHT(your_column,2) will return the last two digits from the string.
How do I get the last three digits of a string in SQL?
SQL Server RIGHT() Function
- Extract 3 characters from a string (starting from right): SELECT RIGHT(‘SQL Tutorial’, 3) AS ExtractString;
- Extract 5 characters from the text in the “CustomerName” column (starting from right): …
- Extract 100 characters from a string (starting from right):
How do I get the last 3 letters in SQL?
SELECT `name` FROM `students` WHERE `marks` > 75 ORDER BY SUBSTR(`name`, -3), ID ASC; SUBSTR(name, -3) will select the last three characters in the name column of the student table.
What is the meaning of like 0 0?
Feature ends with two 0’s. Feature has more than two 0’s. Feature has two 0’s in it, at any position.
What are SQL constraints?
SQL constraints are a set of rules implemented on tables in relational databases to dictate what data can be inserted, updated or deleted in its tables. This is done to ensure the accuracy and the reliability of information stored in the table.