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2_Structured_queries_presentation_l1_v2.pptx
Structured queries
Questions
What is structured query?
What is difference in using queries from constructor and structured queries?
Structured query
A structured query is a query based on a text column and a structured data column. The structured data column is usually in the same table as the text column. For example, you might use a structured query to retrieve documents on a certain subject that were written after a certain date, where the document content is in a text column and date information is in a structured data column.
Why do we use them?
Structured queries are needed to take more specific data that constructor may give us.
Structured query types
DDL (Data Definition Language)
DML (Data Manipulation Language)
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