Table of Contents
How do I comment out in MySQL?
How do I write comments in SQL?
How do I add comments to a table in MySQL?
The comments can be added to the MySQL columns while creating a table by adding the COMMENT keyword after the column definition, as shown above for column emp_name. The table is created successfully with comments. via
Which is the comment symbol in MySQL Mcq?
In MySQL Server, we can write the comments in mainly three ways that are given below: Using # symbol. Using - symbol. Using /* and */ symbol. via
Which operator is used to match text?
The SQL Like is a logical operator that is used to determine whether a specific character string matches a specified pattern. It is commonly used in a Where clause to search for a specified pattern in a column. This operator can be useful in cases when we need to perform pattern matching instead of equal or not equal. via
What is count in MySQL?
MySQL count() function is used to returns the count of an expression. It allows us to count all rows or only some rows of the table that matches a specified condition. It is a type of aggregate function whose return type is BIGINT. via
What are SQL comments?
Comments are used to explain sections of SQL statements, or to prevent execution of SQL statements. Note: The examples in this chapter will not work in Firefox and Microsoft Edge! Comments are not supported in Microsoft Access databases. Firefox and Microsoft Edge are using Microsoft Access database in our examples. via
What is the keyboard shortcut for comment in SQL?
The keyboard shortcut to comment text is CTRL + K, CTRL + C. The keyboard shortcut to uncomment text is CTRL + K, CTRL + U. via
How do I comment out a line in SQL?
The syntax for a comment in a line of SQL code is a double hyphen ( -- ) at the beginning of the line. The comment affects all of the SQL code in the line. Note: This process does not try to merge a new comment with an existing comment. via
How do I see table comments in MySQL?
What is varchar in MySQL?
Varchar in MySQL is a data type used for storing text whose length can have a maximum of 65535 characters. The varchar columns in the table are of variable length string that can hold either numeric or character or both. via
What is key in MySQL create table?
In MySQL, a primary key is a single field or combination of fields that uniquely defines a record. None of the fields that are part of the primary key can contain a NULL value. A table can have only one primary key. via
What is the comment symbol in MySQL?
In MySQL, a comment started with -- symbol is similar to a comment starting with # symbol. When using the -- symbol, the comment must be at the end of a line in your SQL statement with a line break after it. This method of commenting can only span a single line within your SQL and must be at the end of the line. via
What MySQL means?
www.mysql.com. MySQL (/ˌmaɪˌɛsˌkjuːˈɛl/) is an open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder Michael Widenius's daughter, and "SQL", the abbreviation for Structured Query Language. via