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  • How can the UNION SQL clause be used?
    How can the UNION SQL clause be used?
    The answer to this is D. From the name itself, you can already make a guess on what the union clause can do. It has the ability to combine two different statements. Once these statements are combined, it will form a set that will be unique of the two statements that are combined together. This also has the ability to get rid of the duplicated in the set if in case there are any. Duplicates may cause problems with combining statements in the long run. Some get confused with the union SQL and JOIN. JOIN will form answers regarding the relationships between the statements that are given and not the statements themselves.

  • What is the purpose of the SQL AS clause?
    What is the purpose of the SQL AS clause?
    There are different clauses and tools that are used to modify columns and rows in order to edit tables as you need. Each has a precise function and as the names aren’t self-exploratory, you need to learn their uses in order to work them properly. Not only this, you may need to practice them thoroughly as well. For instance, the AS SQL clause is a special tool that is used to change the name of a column in the result set. It can also be used to give heading to different columns in order to ensure optimal editing and performance.

  • Which statement about SQL is true?
    Which statement about SQL is true?
    SQL is the most widely used database language. SQL is a domain specific language used in programming and designed for managing data held in a relational database management system. It is useful in handling structured data where there are relations between different variables of the data. SQL offers two main advantages over the older read/write API's. It introduced the concept of accessing many records with one single command. SQL eliminates the need to specify how to reach a record, with or without an index. SQL may be classified as sublanguages. The scope of SQL includes data, manipulation, data definition, and data control. It is a language, and it includes procedural elements.

  • How do you select all the records from a table named "Persons" where the value of the column "FirstName" starts with an "a" with SQL?
    How do you select all the records from a table named "Persons" where the value of the column "FirstName" starts with an "a" with SQL?
    The correct answer is B. When trying to select all the records from a table named "Persons" where the value of the column "FirstName" starts with an 'a' with SQL, SELECT FROM Persons WHERE FirstName LIKE a%. This answer is from the SQL Practice Test section. SQL is a version of computing language used to communicate with databases in order to perform different tasks. These tasks can range from creating different folders for different clients to any other kind of data organization task. This is commonly used in companies which need to sort large amounts of data or information.

  • Which of the following SQL statements selects the total number of orders from the Sales table?
    Which of the following SQL statements selects the total number of orders from the Sales table?
    Take note that you want to gather information about the total number of orders. This means that you need to choose the select count from sales which is letter B in the choices. This will allow you to select all of the orders that you may need to highlight or check. This is a very helpful command when you want to check if all of the orders are accounted for or if you did not miss any order from the ones that you have already input. You will use select AVG from sales if you want to know more about the average of the sales you have received for a certain time period. You will use Select SUM from sales if you want to know the amount that you made based on the number of sales.

  • Which statement shows the department ID, minimum salary, and maximum salary paid in that department, only of the minimum salary is less than 5000 and the maximum salary is more than...
    Which statement shows the department ID, minimum salary, and maximum salary paid in that department, only of the minimum salary is less than 5000 and the maximum salary is more than...
    This is the correct answer. SELECT dept_id, MIN(salary), MAX(salary) FROM employees GROUP BY dept_id HAVING MIN(salary) <5000 AND MAX(salary) >15000.

  • Which SQL function is used to count the number of rows in a SQL query?
    Which SQL function is used to count the number of rows in a SQL query?
    Which SQL function is used to count the number of rows in a SQL query?

  • What is the difference between Python and SQL?
    What is the difference between Python and SQL?
    Python is one of the most widely recognized scripting languages. Python is a programming language for high level general-purpose, which can be used in the development of websites, web applications, and even desktop GUI. This language was created in the 1980s so that it could be effectively used to teach programming. Python is very easy to learn, and it is also easy to read due to its flexibility. And it contains a lot of features that make it very useful. SQL, on the other hand, is the short form of Structured Query Language. SQL is used to make entry into the database so as to be able to perform some manipulation in the database. This structured language can be used to make your needs known to the database. The database is a collection of related information in a regular structure. Your contact directory is an example of a database. Structured query language was created by IBM.

  • What can UPDATE SQL clause do?
    What can UPDATE SQL clause do?
    Update more than one row at a time.

  • What is the difference between the DELETE and TRUNCATE SQL clauses?
    What is the difference between the DELETE and TRUNCATE SQL clauses?
    It is correct answer The TRUNCATE clause deletes all rows in a database table, while the DELETE clause can have a WHERE condition and might or might not delete all rows in a table

  • What does the 'find' and the 'findNoCase' function return?
    What does the 'find' and the 'findNoCase' function return?
    The find and findnocase functions both find the first occurrence of a substring in a string, from a specified start position. they both return the position of substring in string; or 0, if substring is not in string. the only difference between the two functions is that the find function is case-sensitive while the findnocase function is case-insensitive. their function signatures are as follows:find(substring, string [, start ])findnocase(substring, string [, start ])reference----------http://help.adobe.com/en_us/coldfusion/9.0/cfmlref/wsc3ff6d0ea77859461172e0811cbec22c24-6e16.htmlhttp://help.adobe.com/en_us/coldfusion/9.0/cfmlref/wsc3ff6d0ea77859461172e0811cbec22c24-7e7c.htmlhttp://help.adobe.com/en_us/coldfusion/9.0/cfmlref/wsc3ff6d0ea77859461172e0811cbec22c24-7e7c.html

  • What function can you use to see if a string contains a particular substring?
    What function can you use to see if a string contains a particular substring?
    Find-2. findnocase-the find and findnocase functions both find the first occurrence of a substring in a string, from a specified start position. they both return the position of substring in string; or 0, if substring is not in string. the only difference between the two functions is that the find function is case-sensitive while the findnocase function is case-insensitive. their function signatures are as follows: find(substring, string [, start ]) findnocase(substring, string [, start ]) reference ---------- http://help.adobe.com/en_us/coldfusion/9.0/cfmlref/wsc3ff6d0ea77859461172e0811cbec22c24-6e16.html http://help.adobe.com/en_us/coldfusion/9.0/cfmlref/wsc3ff6d0ea77859461172e0811cbec22c24-7e7c.html

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