Best way to check for "empty or null value"

Best way to check for "empty or null value"

sql database postgresql null coalesce

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How to concatenate columns in a Postgres SELECT?

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Using COALESCE to handle NULL values in PostgreSQL

sql database postgresql null coalesce

postgresql

Return zero if no record is found

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Left outer join - how to return a boolean for existence in the second table?

postgresql join left-join outer-join coalesce

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Postgresql COALESCE performance problem

postgresql coalesce null-coalescing

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Postgres coalesce to empty JSONB array

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Union query distinct on one column

sql postgresql join union coalesce

postgresql

Is postgres COALESCE lazy?

postgresql coalesce

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ERROR: COALESCE types bytea and character varying in PostgreSQL

java hibernate postgresql coalesce

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Using COALESCE with different data types?

sql postgresql type-conversion coalesce

postgresql