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POInsert data from one table data to another table
 

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    <p>I have two tables <code>TAB1</code> and <code>TAB2</code>. I want to insert data in <code>TAB2</code> in a particular column. I want to insert data that has to be fetched from the <code>TAB1</code> on <code>WHERE</code> condition. If fethced data is there, then insert data in <code>TAB2</code>. If NOT, insert blank in <code>TAB2</code> </p> <p>Here I am talking about single column only. I am inserting some other data also. Can it happen in as single SQL Query. I am using Oracle.</p> <p>Here is my demo code. I need something like this:</p> <pre><code>INSERT INTO TAB1('value1','value2',?) if exists(select king from TAB2 where queen='yash' ) ?=select king from TAB2 where queen='yash' if not exists ?='' </code></pre> <p><code>TAB1</code> and <code>TAB2</code> are having different type of columns.</p> <pre><code> TAB1 TAB2 -------- ----------------- col1 col2 col3 col4 col1 king Queen ----------------- ---------------- 1 jan King Robin 1 Alex yash 2 Feb King2 Hood 2 Jhon Shakthi </code></pre> <p>Now I want to insert data in TAB1 from TAB2 with where condition Something like this </p> <pre><code>insert into TAB1(col1,col2,col3,col4) values(5,'MArch',King7, select king From TAB2 where Queen='yash') </code></pre> <p>If select king From TAB2 where <code>Queen='yash'</code> returns <code>'Alex'</code> then that has to be inserted if not blank value has to be inserted.</p> <pre><code> Here Queen column is Unique column .. So you can expect single row data only. TAB1 and TAB2 having different column names and different column Types </code></pre>
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    1. USBabel
    1. USBabel
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    1. COwhat did your means with this statement "if NOT insert blank in TAB2"
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      1. USMina Tadros
    2. COOkay, can you give us some sample contents from `TAB2`, and what you want inserted in `TAB1` in each case? What's supposed to happen when there are multiple rows where `queen = 'yash'`? What happens if there are _no_ rows where that's true, but the table has multiple other entries? If there are multiple entries, what happens when some of them have a matching value, but not all of them?
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      1. USClockwork-Muse
    3. COI have edited my question..
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      1. USBabel
 

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