Sometimes called a star, big dot, and multiplication symbol, the asterisk is a symbol ( * ) found above the “8” key on standard US keyboards and on the number pad. What is the asterisk symbol called? The asterisk (/ˈæst(ə)rɪsk/ *), from Late Latin asteriscus, from Ancient Greek ἀστερίσκος, asteriskos, “little star”, is a typographical symbol. It is so called …
The asterisk (*) is a wild card character that enables you to transfer values between the database and all the fields of a form in a single statement. This multiple assignment applies to simple fields and table-field columns, but it does not include local variables or hidden columns. What does an asterisk do in a database? The asterisk is a …
The IS NULL operator IS NULL is a logical operator in SQL that allows you to exclude rows with missing data from your results. Some tables contain null values—cells with no data in them at all. IS NULL operator syntax? The IS NULL operator tests whether the result of its input expression is NULL. If the input expression returns more …
The use command is used when there are multiple databases in the SQL and the user or programmer specifically wants to use a particular database. Thus, in simple terms, the use statement selects a specific database and then performs operations on it using the inbuilt commands of SQL. What is use of in SQL Server? Usage of SQL Server To …
Just do a SELECT * FROM INFORMATION_SCHEMA. COLUMNS to see all the columns available.
What are the main data error types? Error (statistical error) describes the difference between a value obtained from a data collection process and the ‘true’ value for the population. The greater the error, the less representative the data are of the population. Data can be affected by two types of error: sampling error and non-sampling error. What are the main …
(c) Logic errors A logic error (or logical error) is a ‘bug’ or mistake in a program’s source code that results in incorrect or unexpected behaviour. It is a type of runtime error that may simply produce the wrong output or may cause a program to crash while running. What is logical error example in C? Logical Errors If our …
The name of the MySQL Dolphin (our logo) is “Sakila,” which was chosen from a huge list of names suggested by users in our “Name the Dolphin” contest. The winning name was submitted by Ambrose Twebaze, an Open Source software developer from Eswatini (formerly Swaziland), Africa. Why is SQL logo a dolphin? The name of the MySQL Dolphin (our logo) …
The term “drop” refers to an action taken by a student during the drop period to discontinue enrollment in a course. The term “withdraw” refers to an action taken by a student to discontinue enrollment in a course after the drop period but prior to the withdrawal deadline. What is the difference of withdraw and drop? The term “drop” refers …
In my opinion, learning SQL does not require any algorithm or programming knowledge, only understanding the relational database concept will help to figure out the SQL query’s logic. As possible, you can start SQL learning with simple queries. Do you need a program to use SQL? In my opinion, learning SQL does not require any algorithm or programming knowledge, only …