Implementing Keyword Search in SQL

sql-queries-9/keyword-search-sql/full-text-search-mysql.sql

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+ALTER TABLE Course ADD FULLTEXT(name, textbook);
+
+SELECT id, name, textbook, credits 
+FROM Course 
+WHERE MATCH(name, textbook) AGAINST('Operating Systems');
+

sql-queries-9/keyword-search-sql/full-text-search-postgresql.sql

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+-- Add a tsvector column for full-text search 
+ALTER TABLE Course ADD COLUMN search_vector tsvector;
+
+-- Populate the tsvector column with data from the 'name' and 'textbook' columns 
+UPDATE Course SET search_vector = 
+    to_tsvector('english', name || ' ' || textbook);
+
+-- Create a GIN index on the search_vector column for faster querying 
+CREATE INDEX idx_course_search ON Course USING GIN (search_vector);
+
+SELECT id, name, textbook, credits 
+FROM Course 
+WHERE search_vector @@ to_tsquery('Operating & Systems');

sql-queries-9/keyword-search-sql/full-text-search-sqlserver.sql

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+CREATE FULLTEXT CATALOG ftCatalog AS DEFAULT; 
+CREATE FULLTEXT INDEX ON Course(name, textbook) KEY INDEX PK_Course;
+
+SELECT id, name, textbook, credits 
+FROM Course 
+WHERE CONTAINS((name, textbook), 'Operating AND Systems');

sql-queries-9/keyword-search-sql/using-like-operator.sql

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+SELECT id, name, textbook, credits 
+FROM Course 
+WHERE name LIKE '%Operating%';
+
+SELECT id, name, textbook, credits 
+FROM Course 
+WHERE name LIKE '%Database Systems%' OR textbook LIKE '%Database Systems%';