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MySQL comparison Query

Source: Internet
Author: User
Tags dname
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  2. MySQL --------
  4. Select a. dname,
  6. Max (If(B. Mon ='February', B. YJ,0) In March,
  8. Max (If(B. Mon ='February', B. YJ,0) In March,
  10. Max (If(B. Mon ='February', B. YJ,0) February
  12. From T2 a left join t1 B on A. Dep = B. Dep
  14. Group by dname
  18. MySQL -------
  20. Select a. dname,
  22. Sum (CaseWhen B. Mon ='February'Then B. YJElse 0End) in March,
  24. Sum (CaseWhen B. Mon ='February'Then B. YJElse 0End) in March,
  26. Sum (CaseWhen B. Mon ='February'Then B. YJElse 0End) January
  28. From T2 a left join t1 B on A. Dep = B. Dep
  30. Group by dname
  36. Oracle ------ note: the decode method is different from that of MySQL.
  38. Select a. dname,
  40. Max (decode (B. Mon,'February', B. YJ,0) In March,
  42. Max (decode (B. Mon,'February', B. YJ,0) In March,
  44. Max (decode (B. Mon,'February', B. YJ,0(March)
  46. From Table2 a left join Table1 B on A. Dep = B. Dep
  48. Group by dname

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Related Keywords:
mysql case sensitive comparison mysql comparison operators mysql features comparison mysql storage engine comparison mysql string comparison php mysql date comparison mysql query in query

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