SELECT websites.site_name /* Author: TechOnTheNet.com */ FROM websites; Here is a comment that appears in the middle of the line in SQL: SELECT /* Author: TechOnTheNet.com */ websites.site_name FROM websites; Here is a comment that appears at the end of the line in SQL: ...
Review three methods to add comments in SQL: single-line comments, multiline comments, and inline comments using the following syntax: --, /*, and */.
In PostgreSQL, 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 mu...
/*multi-line sql comment*/ Works: Single-line SQL comments at the beginning of the SQL expression: --single-line sql commentOBJECTID IN (3, 5, 11) Doesn't work: Single-line SQL comments at the end of the SQL expression: OBJECTID IN (3, 5, 11)--single-l...
SQL statements are usually displayed in blue, identifiers (like table and column names) are in black, and so on. Color coding makes it easier to read your code and to find mistakes; if you’ve mistyped a PL/SQL statement, it’ll probably appear in the wrong color. Oracle SQL Developer...
In this case, MySQL Server parses and executes the code within the comment as it would any other SQL statement, but other SQL servers ignore the extensions. For example, MySQL Server recognizes theSTRAIGHT_JOINkeyword in the following statement, but other servers do not: ...
Re: You have an error in your SQL syntax; check the manual that corresponds -- Create the sample database CREATE DATABASE testdb; -- Switch to the test database USE testdb; -- Create the sample table CREATE TABLE SampleTable ( DateValue DATE, CopperHeadGrade DOUBLE, LeadHG_...
0 - This is a modal window. No compatible source was found for this media. //printf('Connected successfully.');$sql="SELECT ID /*NAME, ADDRESS*/ FROM CUSTOMERS WHERE ADDRESS = 'Mumbai'";if($mysqli->query($sql)){printf("Select query executed successfully...!\n");}printf("Table rec...
30 is the default length of any data type in the CAST function.Discuss this Question 6. Select the correct type(s) of SQL Comments.Inline Comments Single Line Comments Multi-line Comments All of the aboveAnswer: D) All of the above
Hints were introduced in Oracle7, when users had little recourse if the optimizer generated suboptimal plans. Now Oracle provides a number of tools, including the SQL Tuning Advisor, SQL plan management, and SQL Performance Analyzer, to help you address performance problems that are not solved by...