Since your query doesn't include a reference to the 'a' table explicitly as a table, the engine has no idea what a is. This select statement is returning a result table that we alias with the name temp. Essentially what this is doing is while trying to update the table that we here are aliasing as t, you simultaneously run a select statement. Syntax: UPDATE tablename SET columnname1 newvalue, columnname2. 1 SQL queries always explicitly reference their tables by name, apart from any references to the columns in the tables. Here is a link for the documentation on this syntax. Python Dictionaries Access Items Change Items Add Items Remove Items Loop Dictionaries Copy Dictionaries Nested Dictionaries Dictionary Methods Dictionary Exercise Python If.Else Python While Loops Python For Loops Python Functions Python Lambda Python Arrays Python Classes/Objects Python Inheritance Python Iterators Python Polymorphism Python Scope Python Modules Python Dates Python Math Python JSON Python RegEx Python PIP Python Try. Update with SQL Expression // products ID is 3 // UPDATE products SET price price 2 + 100, updatedat 21:34:10 WHERE id 3 //. The UPDATE TABLE statement is used to update records of the table in the database.
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