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Asked: 2026-05-23T13:15:20+00:00

I have two tables which I need to join. First Table: EFF_DATE RATE CURRENCY

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I have two tables which I need to join.

First Table:

EFF_DATE     RATE   CURRENCY
20110101     1.286  USD
20110201     1.275  USD
20110301     1.275  USD
20110401     1.260  USD
20110501     1.225  USD

2nd Table:

PO_NO   TRANS_DATE  ACCT_DATE   SUPP_NO CURRENCY     LOCAL_AMT 
1000068 20110114    20110115    S016    USD          16,500.00 
1000070 20110214    20110215    S016    USD           7,660.00 
1000072 20110317    20110322    S025    USD           1,080.00 
1000132 20110314    20110315    S037    USD           3,500.00 
1000133 20110414    20110415    S038    USD          14,500.00

Based on ACCT_DATE, I wish to add RATE column & the result should look like this:

PO_NO   TRANS_DATE  ACCT_DATE   SUPP_NO CURRENCY     LOCAL_AMT  RATE
1000068 20110114    20110115    S016    USD          16,500.00  1.286
1000070 20110214    20110215    S016    USD           7,660.00  1.275
1000072 20110317    20110322    S025    USD           1,080.00  1.275
1000132 20110314    20110315    S037    USD           3,500.00  1.275
1000133 20110414    20110415    S038    USD          14,500.00  1.26
1000170 20110531    20110531    S016    USD          15,400.00  1.225

How can I achieve this by using SQL? Thanks!

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1 Answer

  1. Editorial Team

    In MySQL you would do something like:

    SELECT st.*, ft.rate FROM second_table st LEFT JOIN first_table ft ON (MONTH(acct_date) = MONTH(eff_date) AND YEAR(acct_date) = YEAR(eff_date) )
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