The SQL CASE ExpressionThe CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE...
https://www.w3schools.com/sql/sql_datatypes.asp https://docs.oracle.com/cd/B28359_01/server.111/b28318/datatype.htm#CNCPT012 Temas SQL Data Analysis Hafsa JabeenData Engineer & Business Analyst Temas SQL Data Analysis SQL Basics Cheat Sheet SELECTing Multiple Columns in SQL Aggregate Functions...
W3Schools SQL Tutorial: If you would like to explore a detailed tutorial of SQL, this is the perfect place to start. This tutorial includes interactive examples you can edit, test, and recreate. Use it as a reference or complete the whole tutorial to practice using SQL. Click the greenStar...
ORDER BY OrderDate ASC; https://www.w3schools.com/sql/trysql.asp?filename=trysql_select_count example
Stored procedures are optimized when they are saved, not every time they are executed. A more complicated T-SQL stored procedure might use multiple SQL statements, input and output parameters, local variables, BEGIN...END blocks, IF...THEN...ELSE conditions, cursors (row-by-row processing of...
CASECreates different outputs based on conditions CHECKA constraint that limits the value that can be placed in a column COLUMNChanges the data type of a column or deletes a column in a table CONSTRAINTAdds or deletes a constraint CREATECreates a database, index, view, table, or procedure ...
This video starts by explaining some basic SQL terminology and its main uses. It then shows you how to perform an SQL query. By the end of the video, you’ll be able to use criteria conditions, retrieve data from multiple tables, and organize and export the query results. ...
AND, OR, NOT:not execute the query when the condition is not True. While, AND and OR are used to apply multiple conditions. ORDER BY:it sorts the data in ascending or descending order GROUP BY:it groups identical data. HAVING:data aggregated by Group By can be further filtered out here...
CASE WHEN Problem with CASE NULL, NULL does not equal anything. The case statement is basically saying when the value = NULL .. it will never hit. ***There are also several Avoid NULL value in CASE SQL SERVER Question: The issue at hand is having multiple DPB.ProductTypeId in the DPB...
• Cannot contain an ORDER BY clause, however sub-query can use ORDER BY when used with TOP clause • Can contain more than one sub-query Types of sub-queries: • Single-row: the sub-query returns only one row • Multiple-row sub-query: the sub-query returns multiple rows ...