What is prepared statement in sql?

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Why primary key is required?

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in sql table follw columns r their vehicle_no|servicetype|date|location| 1234 |1FS |1-JAN|PUNE| 4561 |2FS |5-JAN|PUNE| 1234 |PS |7-JAN|PUNE| 1234 |PS |15-JAN|MUMB| i want o/p below vehicleno|1fs|1fsdate|1fslocation|1ps|1PSDATE|1PSLOC|2PS|2PS DATE|2PSLOCA e.g 1234|1FS|1JAN|PUNE|1PS|7JAN|PUNE|2PS|15JAN|MUMBAI PLS help me out to execute using sql query

1 Answers  

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How many types of index are there?

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What is the difference between the Primary and Foreign key?

7 Answers   Cap Gemini,

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what is a primary key? : Sql dba

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What is a sql trace file?

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what is the difference between char_length and length? : Sql dba

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In a table i have columns A,B,C and i have a composite index on columns A,B if so will the following query uses index or not? SELECT sal,name FROM <table_name> WHERE A=<value> AND B=<value> AND C=<value>;

2 Answers   Mastek,

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What is difference between sql and mysql?

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What is pivot table in sql?

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how to return query output in html format? : Sql dba

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