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**N.G.Acharya & D.K.Marathe college Chembur-E, Mumbai-71**

K.P.B. HINDUJA COLLEGE OF COMMERCE Workshop in Computer Programming : S.Y.B.Com. Computer Systems and Applications: T.Y.B.Com. MySQL : Prof. Pradeep Kore N.G.Acharya & D.K.Marathe college Chembur-E, Mumbai-71

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MySQL Set of My-SQL functions was decided in the previous workshop(s) should continue ! String functions:- 1. CONCAT(str1,str2..) 2. LOWER(str.) , UPPER(str.) 3. LENGTH(str.) 4. LTRIM(str.) , RTRIM(str.) ,TRIM(str.) 5. LEFT(str., len) , RIGHT(str., len) , MID(str, pos, len) and SUBSTRING()

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**MySQL Date functions :- Numeric functions :-**

1. NOW() , TIME(expr) and CURDATE() 2. DAY(date) , MONTH(date) and YEAR(date) 3. DAYNAME(date) and MONTHNAME(date) 4. DATE(expr) Numeric functions :- 1. ABS(x) 2. EXP() 3. POW() 4. MOD() 5. ROUND() 6. SQRT()

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**MySQL Aggregate or Summary or Group functions:-**

COUNT() : For counting number of the rows of the specified column. SUM() : For summing of the non null values in the specified column. AVG() : For averaging of the non null values in the specified column. MIN() : For finding minimum of the non null values in the specified column. MAX() :For finding maximum of the non null values in the specified column.

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**MySQL In the previous years patterns:-**

Marking scheme of all five units in annual exam. paper. Five units of the syllabus (80 marks paper): (=16x5) Five units of the same syllabus (annual pattern) marks : ( =12x5) Now in the current semester based system of Five units of Sem-V (60 marks)+ Sem-VI (60 marks) Total 120 marks : (=24x5) with out options. With 50 % options 180 marks : (=36x5)

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**MySQL Total marks for MySQL is 10+10+4 =24 and with options 15+15+6=36**

Marking scheme of MySQL in Question Paper:- Q 2. A) Attempt any two sub-questions from a, b, c in MySQL a) MySQL (5) b) MySQL (5) c) MySQL (5) Q 3. A) Attempt any two sub-questions from a, b, c in MySQL Q 4. B) Attempt any four sub-questions from d, e, f, g, h, i in MySQL (Multiple Choice) (4) d) MySQL e) MySQL f) MySQL g) MySQL h) MySQL i) MySQL Total marks for MySQL is =24 and with options =36

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**MySQL Five marks six questions can be 1. Create table question :-**

(This question must be carefully designed so that no variation in marking schemes at the paper assessment. ) 2. Simple queries, sorting queries, queries with condition(s), queries with calculating results with new heading(s) using existing columns. 3. Group/ Summary Queries using Group by clause (& using group functions : COUNT(), SUM(), AVG(), MAX() & MIN() 4. Multi table queries: Simple joins (INNER JOIN) only 5. Nested queries ( Only up to two levels) : Subqueries.

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MySQL 6. i) Changing table structure ( Alter table…add/drop/change/ modify/rename …etc ) ii) Adding / deleting /updating rows/ row contains in the existing table. iii) Renaming /Removing databases, tables. Displaying list of existing databases, tables in a existing database. iv) Simple transaction:- START, COMMIT & ROLLBACK. v) Queries using MySQL functions.

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**MySQL Discussion with reference to MySQL :-**

To define exact set of MySQL functions. Queries using limit clause can be included as scope of syllabus. To define exact marking scheme of multi-table queries. (Since in some question papers one query 5 marks or in some papers its carry 2 marks.) In multi-table queries Self Join discuss or not?

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